It seems Microsoft are having some kind of problem with their Game Room on Xbox Live Arcade. Microsoft EMEA Xbox editor Daniel Maher tweeted the following:
"The latest batch of Game Room content has also been delayed until further notice - I'll let you know once a new date is confirmed."
The original plan from Microsoft was to start delivering weekly updates at the end of April, but now it would seem we are going to have to wait a little longer. Developer Krome Studios have recently been forced to lay off a number of people, and perhaps this could be a reason for the delay.