Now that he has been put out to pasture as executive chairman, former Google CEO Eric Schmidt has plenty of time to mull over his tenure in the top spot and -- rather remarkably -- pontificate in public about his successes and failures. While this may not be what Larry Page and Sergey Brin had in mind for his post-CEO career, it sure makes for interesting reading; indeed, I think Schmidt's most recent statements illuminate some of the reasons that Google has failed (so far) to plug into the social media phenomenon.