I know that I "should" upgrade my ROMs to 3.1 (and actually that is in my plans) but IIRC WB 3.1 will work with the 3.0 ROMs.
Basically, I am hoping to install my WB 3.1 ontop of my current system without destroying my current data, TCP setup, etc?
Though it would be ideal to have a cleam install of everytihing :-)