I can see that this is a bit old, but it came up on a search, and I have an answer!

I have a similar issue, had the fax for years, on my cards/letterheads etc and not wanting to do away with it. indeed a further prob was that when i was away from office, someone had to be there to read the faxes, phone me to tell me the contents, and if necessary feed them back in to forward them.

I signed up with www.voipfone.co.uk (i am sure there are similar things in other countries, and they prob work internationally), then ported my tel number to them. i now get all faxes that are sent to my fax number forwarded to me as a pdf attachment on email. i can then forward it as necessary by email. the bonus is that i can also sent outgoing faxes by email appearing to come from that fax number. it costs me about £2 ($3) per month and works a treat. I am very happy with the results.