As per many peoples' requests, I just finished the first version of RoboIDE, a Linux (GTK+) PBASIC IDE that supports all eight slots (I hope).
You can find it at my website:
http://FIRSTprograms.tripod.com/Programs.htm or in the whitepapers(soon).
As always, let me know what you think of if there are more features you'd like to see.
--Rob