RoboCup has slowly progressed into a very amazing competition!
My two favorite competitions are Small Size League & Standard Platform(formerly Aibo league)
You can read the specifics on the competition website,
http://www.robocup2009.org/20-0-robocup-soccer.html
Small Size League- Thailand is really advancing the technology way beyond everyone else !
Skuba & Plasma Z look really dominate in their design presentations & overall performance.
Standard Platform League - The first year with new hardware is quite painful to watch (very slow compared to the AIBOs) but I'm impressed with the number of teams &
NAO technology. They don't have the official results posted, but I see UT-Austin is in the
semi-finals ! B-Human (from Germany) looks to be the team to beat.