I used the air print instructions posted in the ipad forum to get airprint working with my iPad and iOS4.2 and I found one nice little side effect. I have never been able to get printing to work between my win7 pc and macbook. I tried a bunch of things and just gave up to using a dropbox folder that was being monitored on the win7 desktop called print queue (instructions somewhere). There was never anyway for me to easily find my shared printer until now. I fired up settings.app earlier today and was totally surprised to see this. I just thought I'd share.