Assault Heroes assaulted with co-op issue

As Jerry Seinfeld might put it, "what's the deal with Assault Heroes?" We posted our favorable impressions of the game last week, and we have since encountered a serious problem. During our first play test we encountered some connection problems with co-op games. In some cases we could never get one started and were left hanging on a "waiting" screen. Other times, we've been left hanging at the same screen in between levels -- after we've already established a connection. Playing with a blogger from Joystiq today (Ludwig Kietzmann), we managed to join 1 out of 3 games. According to Kietzmann, the one successful game we played was the first one he had ever been able to join since the game's release.

We haven't played the title enough to assess how serious this problem is, but if it is widespread, then it needs to be dealt with. Have any of you encountered this problem? If so, speak up.