Convert email to contact form link

Hi,

I got this idea after seeing that the CCK email field could transfrom an email to a contact form... that was really cool.

This way the email is never exposed (not to spambots but also not to humans which can also be desirable) and the added benefit is that the end user does not have to fire up its email client because the email sending is handled right inside the browser.

Do you think this is a good idea and feasible?

Grtz, Buckley