Interesting Sign up Forms

Some time we find very bad signup forms (eg:2) in the web. Its very important that signup form are easy to complete. Have a look at the signup form of http://www.seniorpeoplemeet.com/sign_up/. Its very intuitive and interesting. I like the way signup form is designed in this website. This form is desinged keeping senior people in mind, but this interaction can be useful easy any one.