TechCrunch reports that Twitter is on the verge of launching its own photo-sharing service in direct competition with existing services like TwitPic and yFrog. The big news for iOS device users is this service might have system-level integration in iOS 5. According to TechCrunch, the site has heard from several sources that "Apple's new iOS 5 will come with an option to share images to Twitter baked into the OS. This would be similar to the way you can currently share videos on YouTube with one click
