While Tito doesn't have a ready-made widget to embed the register interest form on your own website at the moment, you can customize your own with a few lines of code like we did for this event: http://2015.ull.ie
The JavaScript we used can be found at: http://2015.ull.ie/javascripts/site/register_interest.js
You only need a small portion of it, e.g.
$('.register-interest-form').submit(function(){
name = $('#register-name').val()
email = $('#register-email').val()
if($.trim(name) != '' && $.trim(email) != '')
{
url = ["https://ti.to/ull/2015/interested_users/subscribe.json?&interested_user[email]=", email , "&interested_user[name]=", name, "&callback=?"].join('')
$.getJSON(url, null, function(data){})
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