Approximately 12 seconds (okay, three days) after all that hubbub over News Corp. making a bid for Dow Jones comes news that Canada's financial news services company Thomson Corporation is going after Reuters. Speculation puts the bid at $15 billion, which – after Reuters' share price spiked on the news, bringing its market capitalization to about $15.4 billion – might not be enough. Meanwhile, the 156-year-old company has one of those complicated ownership structures big media are so fond of these days, which doesn't necessarily impede the chances for Reuters accepting an offer, but it does force folks like us to study up on stock classes and trusts. Annoying!