Morn,
I think Nakata is going to the olympics. The roster names listed on the Jsoccer.com website is accurate, but these are the players who will be called on for training camp for olympics. JFA and Japan coach Troussier knows that Nakata needs to be in Roma, so they have decided not to call Nakata to camp nor some pre-olympics matches. If you look at the roster there are a few players over the age limit but out of those listed, I'm pretty sure it will be GK Narazaki, DF Morioka and Nakata. FW Nishizawa has a good chance but currently he is in talks with Spanish teams and French teams. So he may not go to Olympics if he closes a deal with any of these teams. Also the midfield line up tells us that Nakata is vital. There are two AM's listed who are Nakamura and Ono, but Ono is still recovering from another injury. So it's most likely that Nakata will be called up. Nakata has played with this team previously so he knows what the team is capable of and what he can contribute to the team.
I'd wished that he wouldn't go to the olympics. Also the media is reporting that his website may become a direct violation with Olympic rules. I haven't followed up entirely, but it seems like that no olympians may promote, report or keep a diary and broadcast these contents live during the olympics. So far there hasn't been any actions taken but I don't think there's going to be any big deal about it.
cheers,
PS.
I'm excited about the olympics since Japan will play against Brasil again. I hope they can beat them again like 96 Atlanta olympics. Anyways, this team will be the core of 2002 World cup, so regardless of the outcome, it will be a great experience for the team.