Are you saying that the intercept can't get live wallpapers with 2.2? Maybe it's because it is running the sprint version of froyo. The update for virgin mobile phones will be slightly different than sprint phones, maybe the sprint froyo update has some incompatible things when run on the vm intercept. I know people who are running the sprint update on their vm phones and they can't receive mms.
I guess we will have to wait until this spring to find out.