I'm going to shamelessly plug in for Git at GitHub; open-sourcing your code like 111 and 254 is fantastic, and Git is definitely gaining widespread adoption.
I agree with Joe; I think it's unlikely that Perforce would be easy to install on GoDaddy.
From Googling/SO searching, I found that
Assembla supports Perforce repositories. Depending on how many programmers you have, you may be able to squeak past with their free plan.