AppleInsider reports this morning that the latest developer iOS 4.3 beta 2 release mentions a new MobileMe-based Photo Stream picture sync feature, supposedly part of a new Media Stream service and in addition includes versions of a standalone FaceTime and PhotoBooth app for iPad. The idea behind Photo Streams is the facility that you will be allowed to invite other users to view your photos as you take them and upload them to a service, which seems to be connected to MobileMe and 9to5 Mac speculate that Media Stream can be directly connected to Find my Friends. We already know that this latest release includes updates for the new Apple…