I was looking for an incoming fax service, and found this site, which offers incoming fax and a few other nifty things, for free. I can't say the incoming fax is business-grade reliable (yet) as they're still working out the kinks, but I hope they can get it all sorted out because the concept is really groovy. Check them out at http://drop.io.
eFax still offers a free incoming fax service, but you have to use their software to read the faxes. It's located here: http://www.efax.com/efax-free
This is why the Internet is cool.