Google has a problem, and it's all about commitment and addiction. The release of Google+ for iPhone v2.0 today has already got Android lovers up in arms, furious at what they see as favoritism for the rival platform. Google should, they argue, prioritize Android users - after all, they're the ones who have already supported the search giant by buying an Android device in the first place. But social networks online - just as is so often the case with their real-world counterparts - can be tricky and treacherous things. The blunt truth is that Google needs to convince Apple users more than it does those of Android.