Yes, just send the fax via regular fax machine to the client and he will receive it as an e-mail attachment. The e-fax software is free if you wish to just receive faxes but you must pay (I believe about $12 a month) to have faxing capabilities. Check out the already posted link for more information. Note* - If you do download if for free, you can only receive up to 20 fax pages a month for free. Also, your fax number is randomly selected so you might live in New Hampshire but have a fax number with an area code in Montana (for example). You have to pay to get a number in your own area code. Still, it's a pretty great service. I haven't had any issues with it so far.
I this case, then, I have to pay for the service. Hope the economies of scale work to pay the fee...:)
Thanks to both!