I'm new to Bitcoin and Bitcointalk (as you can probably tell with this being my first post), but I've been teaching myself how to make games for years. In that time I've had some limited experience working with teams, so I might have some tips to share. It depends though, are you trying to develop a normal game, or one that incorporates Bitcoin somehow? Also, what language and/or platform are you making the game with?
One tip I can share now is you should provide as many details as you can afford to. For the same reason that you worry about people flaking out, those who would actually be good team members also worry about joining a project that will likely flake. In addition, as obvious as it sounds, money really does improve your results. A team member is much more likely to do their job if they know there's profit on the line, though ideally they will also have a passion for the project.
I can offer more help with finding a team after I know what kind of game it is. I have art and programming skills myself, and have several contacts, but it really depends on what you're making. Finally, if you'd rather not reveal details in the thread, you can PM me.