It'd be nice if we were able to startup multiple games at the same time. At least ones that we already have the resources for. While downloading resources for a game it prevented me from doing a build->run in the DM compiler.

It also wouldn't hurt if the splash screen either showed up on the task bar or stayed on top of other windows; having to alt+tab to it is kind of a pain.
Yeah, I have to wait for the resources to finish up before I can join another game :|