Who else besides me is using DotPhoto? It's a free, one page website with unlimited storage and unlimited albums available and you can create password protected proofing albums with online ordering. Very basic, but effective.
I can't believe nobody has said it yet...how about online glass rentals for that extra special first wedding and someone told you not to use your 18-55 kit lens.
Oh, and as to if it should have its own domain name, that's up to you. A very paired-down version of it might look good on your site... some sort of for photographers section. I always thought that made people look good -- as if you have something to say to photographers as well. Of course, that only makes sense if you really do have something to say. This is pretty fantastic stuff.
*bump* Trying to! My kids have been in and out of the hospital with brochitis, and stuff. I am planning on updating to a website or something sometime before May.