“I’m just doing my best… and you can blame it all on me. It’s all my fault.” These somber words are spoken with a genuine humility one seldom hears in the hustling, grandstanding world of technology startups. Seesmic founder Loic Le Meur is speaking them to me over a crackling phone connection today as he explains why he had to let go of more than half his team from the cross-posting service — 18