With the assistance of the #SpaceEmpires channel denizens, I've been working on a new site to replace Admiral's PBW. If you take a look at the "Welcome to PBW2" news article, linked from the home page, you can see what the overall plan is. I'd like to open it up to a larger pool of users to gather suggestions, test features, and so on. The service is still in alpha stages of development, so please be kind.
At this stage, the site can be used for hosting and collecting game files. There is no game processing as of yet, but it can help game hosts avoid the pains of PBEM at least.
http://pbw.spaceempires.net/