I'm not a big ticket sales guy, so there could be more advantages than I'm pointing out here, but from talking to people around the office, here's what I know.
1) They probably would have had a player or two there, but it just happened to fall on the same week as Jameer Nelson's team unity trip.
2) The big advantage of going today is you get to select your package before others. With the extremely limited amount of tickets left, it's a much bigger advantage than in years past. You also get an in-person view of the seat, which is more accurate than any program can provide.
Edit: By the way, all the info can be found here: http://www.nba.com/magic/news/...t_a_seat_081809.html