If you like Paper Napkin, you might like this other stuff. Or not, how should I know.
Endquote is the site of Josh Santangelo, who made this silly thing. Maybe you want to hire him to make a nifty web thing for you.
Spiceplay is another project he did, which is much more interesting, features cute naked girls, and actually attempts to make money, unlike this one.
Dreamhost hosts this site for free, but if you pay them they'll do just as good a job hosting yours.
Smashing Ideas is where Josh goes to work every day. He works with some really insane brilliant people.
Google News helpfully reports all the zillion places that have published stories on Paper Napkin.
Rejection Line is a service that works just like Paper Napkin, except it's a phone number you give out instead of an email address.
Rejection Hotline is similar to the one above, but they have more numbers around the US.
noitcejer.com is an email rejection service similar to Paper Napkin (it's "rejection" spelled backwards).
The guy who made this also made some other things, which are much more interesting.
This site is graciously hosted by the punks at Dreamhost.com.