FYI: BMW Apps with my iPhone 4S on iOS5 works fine with the web radio app. I did not test it with Pandora. Also, normal iPod navigation via the idrive works fine as well. I also have it plugged into the iPhone 4 media adapter.
Current - '11 e92 M3 SG/FR ZCP|ZCV|ZP2|2MK|494|415|6NR|752