I'm not sure if this is what you're looking for but I created RESTMailer (http://restmailer.mihirgarimella.com http://restmailer.mihirgarimella.com) a little wh

I'm not sure if this is what you're looking for but I created RESTMailer (http://restmailer.mihirgarimella.com http://restmailer.mihirgarimella.com) a little while ago. It does exactly this - you create the form and RESTMailer powers the rest, including validation and sending. I use it for my own contact form...