C.C.
I've had e-fax for years. Just go to www.efax.com and they have several options. You can have the type where you can only receive faxes (and I think that is free, or close to it). If you pay $20/month, then you can send and receive faxes. It's very easy - you just choose whatever document you want to fax, hit "print" and efax is one of your printer choices. From there you fill in where you're sending it to, what (if anything) you want to put in the message part of the cover page and then "print" it (which is the same as hitting "send" on a fax machine).
I like it because I can get my faxes from anywhere and they're stored online. I'd recommend it.