Give more priority on getting the top apps on WP7
WP7 lacks too many top apps like Instagram, Bloomberg, CNBC RT, Skype, New York Times, FT, WolframAlpha, CNN, LinkedIn etc etc...
Do you honestly think Microsoft hasn't asked these companies? Microsoft is throwing money at developers constantly.
Rather than moaning here, moan to the companies themselves. If they get enough people moaning, they are far more likely to do something, than reading a random couple of posts on some internet forum
Im sure theres already a LinkedIn app, and Skype is definitely coming, i've seen hundreds of articles about it.