I'd like to add a low budget plug for Onesuite.com and their Messageone service which costs $1 (!) a month for a receive only fax to email service.
The number I got has a 909 area code (Calif?). Efax has a free fax to email service but you are limited to 20 pages per month and get several marketing emails for each document you receive.

Yes, I have a cheapo fax machine at home but Messageone really shines when I'm on the road. I like it so much that I often use it at home to scan documents to email for online storage. Much faster than a software based scan to edocument solution.

As for faxing documents from the road I usually locate a fax machine and use my own calling card if necessary.

Some of you will remember that onesuite had some issues last October but that was a blip in several years of reliable service.

Works for me.

Jim