I am looking into a site called Ooma they have fax services that you just send a message to the site and it goes straight to the phone. It's a phone service not necesarrily a site. but It's all sent in electronically. Ooma's pricing is very cheap and they have good deals.
If you or your company are looking to incorporate an online fax service into your office's workflow, here are some things you should keep in mind as you select a business faxing service.