Facebook, like many other corporations, solves a lot of its problems with its checkbook. If there's a weakness or hole in its operations, it can simply find a company that does that thing well and buy its technology and staff. Simple. Yesterday, it was reported that Facebook purchased a Q&A service called Friend.ly that, like Formspring, lets users post questions. And since whenever a larger company buys a much smaller company, it's usually done with a crystal clear intention in mind, many wondered what Facebook will do with its latest acquisition. We have no clue. But we're sure it'll be put to good use like these nine other companies that Facebook acquired over the years.