I'm running a small web site off of a dsl connection, and from what I hear from my visitors is that it's no slower or faster than any other site (I thought it would be slower since I only had dsl). Anyway, just don't be downloading a lot of stuff, or be online too often, because then it will be slower. But you should at least have a deticated server, even if its a $700 one from the store -- just so the server is not the same one you use for internet browsing.

-Mike