Only a quick update needed here - As expected, Seibu is going to accept the high bid for infielder Hiroyuki Nakajima. This is all over the Japanese media, but I'll choose the Jiji Press's brief writeup, which says that Seibu will file the paperwork on the 7th (JST) and the winning team will be made public within the same day.
So we don't know the winning team or bid amount yet, though the Giants and Brewers have both clarified that they did not bid. So who might the winner be? My first three guesses would the Mets, the A's, and the Rockies. But I'm not really up on the infield needs of most of MLB, so those really are random guesses.