Extensions:

Make your own "bullet proff" @image

He, the little nitty gretty thing's you know

Have fun. ...

nhacks.com/email/

Kimspitstop, blogoscoped.com/forum/2854.htm ...

Have a nice day ^_^

Yannick Mückenhirn ® noticiasinteresantes.blogspot. ...

that's seriously cool! wow!

yes but how can i add it to my Gmail signature?

Yaacov, actually you cannot add an HTML signature to your Gmail account. For now you can add only a text based one. You use the signatures provided in the link above in a forum, etc.

Yannick Mückenhirn ® noticiasinteresantes.blogspot. ...

coooool tool
especially after yule

Isn't this just a "clever" way of collecting people's email addresses to send spam to?

Maybe I shouldn't be so cynical... ;-)