A lot of activity over on the Education NXT blog! Here's their announcement regarding the latest version of RoboLab. It's a good read, with a lot of information. The great news is that they've created this as a transition from the RCX to NXT - but it does appear that this will be the LAST version of RoboLab.
I'm specifically interested in this new website that is also announced... hopefully Education NXT will release some more info on it soon.