diff --git a/lib/unix_dog/Controller/Register.pm b/lib/unix_dog/Controller/Register.pm
index 6cede98..e5eae8e 100644
--- a/lib/unix_dog/Controller/Register.pm
+++ b/lib/unix_dog/Controller/Register.pm
@@ -2,6 +2,7 @@ package unix_dog::Controller::Register;
 use Mojo::Base 'Mojolicious::Controller', -signatures;
 use Net::LDAPS;
 use Net::LDAP::Extension::SetPassword;
+use Net::LDAP::Constant qw(LDAP_NO_SUCH_OBJECT);
 use Email::Simple;
 use Email::Sender::Simple;
 use Email::Sender::Transport::Sendmail;
@@ -16,24 +17,29 @@ sub register($self) {
     $v->required('username', 'trim')->size(1,32)->like(qr/^([a-z_][a-z0-9_-]*[\$]?)$/);
     $v->required('password')->size(8, 256);
     $v->required('email')->size(1, 512);
-    $v->required('pub-key')->size(1,4096);
+    $v->required('pubkey')->size(1,4096);
     $v->required('bio')->size(1, 2048);
 
-    if ($v->has_error) {
-        $self->stash(err => 'Your input was invalid. Please try again.');
-        return $self->render('register/registerPage');
-    }
-
     my $username = $self->param('username');
     my $password = $self->param('password');
     my $email = $self->param('email');
-    my $pubkeys = $self->param('pub-key');
+    my $pubkeys = $self->param('pubkey');
     my $bio = $self->param('bio');
     my $fromIP = $self->tx->remote_address;
 
-
-    $self->stash(email => $email);
     $self->stash(username => $username);
+    $self->stash(email => $email);
+    $self->stash(pubkeys => $pubkeys);
+    $self->stash(bio => $bio);
+
+    if ($v->has_error) {
+        my $err = "Your input was invalid. Please try again.";
+        my @failed = $v->failed;
+        $self->stash(err => $err);
+        $self->stash(failed => @failed);
+        $self->stash(v => $v);
+        return $self->render('register/registerPage');
+    }
 
     my $config = $self->config;
     return Mojo::IOLoop->subprocess->run_p(sub {
@@ -59,6 +65,20 @@ sub register($self) {
         my $nextUID = int($uidEntry->get_value('uidnumber'));
         my $nextGID = int($uidEntry->get_value('gidnumber'));
 
+        $mesg = $ldap->search(
+            base   => 'ou=Dogs,dc=unix,dc=dog',
+            filter => '(uid=' .$username. ')',
+        );
+        $mesg->code  and  die $mesg->error;
+        $mesg->count == 0 or die 'That username is already in use.';
+
+        $mesg = $ldap->search(
+            base   => 'ou=Dogs,ou=Unverified,dc=unix,dc=dog',
+            filter => '(uid='. $username .')',
+        );
+        $mesg->code  and  die $mesg->error;
+        $mesg->count == 0 or die 'That username is already in use.';
+
         $mesg = $ldap->modify(
             $uidEntry,
             replace => {
@@ -74,7 +94,7 @@ sub register($self) {
             $userDN,
             attrs => [
                 cn            => $username,
-                mail          => $email,
+                mail          => $username . '@unix.dog',
                 sshPublicKey  => (split "\n", $pubkeys),
                 objectClass   => [
                     'top',
diff --git a/public/css/main.css b/public/css/main.css
index 39624f8..8e9218c 100644
--- a/public/css/main.css
+++ b/public/css/main.css
@@ -151,3 +151,7 @@ textarea {
 #header-content a:hover {
     text-decoration: underline;
 }
+
+label.field-with-error {
+    color: red;
+}
diff --git a/templates/register/registerPage.html.ep b/templates/register/registerPage.html.ep
index c83f437..116c891 100644
--- a/templates/register/registerPage.html.ep
+++ b/templates/register/registerPage.html.ep
@@ -5,6 +5,14 @@
     <p class="error">
         <%= $err %>
     </p>
+    <% if (my $failed = stash 'failed' and my $v = stash 'v') { %>
+    <ul class="error">
+        <% foreach my $fn (@{$failed}) { %>
+        <% my ($check, $result, @args) = @{$v->error($fn)}; %>
+        <li><%= $fn %>: <%= $check %> <%= join "-", @args %></li>
+        <% } %>
+    </ul>
+    <% } %>
 <% } %>
 <p>
     Before registering for UNIX.dog, please be sure you agree
@@ -24,34 +32,28 @@
     information over LDAP under cn=username,ou=Dogs,dc=unix,dc=dog.
 </p>
 
-<form action="/register" method="POST">
+%= form_for register => (method => 'POST') => begin
     <p>
-        <label for="username">Username:</label>
-        <input type="text" id="username" name="username">
+        %= label_for username => 'Username:'
+        %= text_field 'username', id=>'username'
     </p>
     <p>
-        <label for="password">Password:</label>
-        <input type="password" id="password" name="password">
+        %= label_for password => 'Password:'
+        %= password_field 'password', id=>'password'
     </p>
     <p>
-        <label for="email">EMail:</label>
-        <input type="email" id="email" name="email">
+        %= label_for email => 'EMail:'
+        %= email_field 'email', id=>'email'
     </p>
     <p>
-        <label for="pub-key">
-            Put your SSH keys here.
-            Separate them by a newline if you have multiple.
-        </label>
+        %= label_for pubkey => 'Put your SSH keys here. Separate them by a newline if you have multiple.'
         <br>
-        <textarea name="pub-key" id="pub-key"></textarea>
+        %= text_area 'pubkey', id=>'pubkey'
     </p>
     <p>
-        <label for="bio">
-            Tell us a bit about yourself here.
-            Feel free to put some links, too :)
-        </label>
+        %= label_for bio => 'Tell us a bit about yourself here. Feel free to put some links, too :)'
         <br>
-        <textarea name="bio" id="bio"></textarea>
+        %= text_area 'bio', id=>'bio'
     </p>
-    <input type="submit" value="Submit!" id="submit">
-</form>
+        %= submit_button
+% end