Just checking my e-mails before bed, so I haven't looked into this at all - I'll just post the good news as Acclaim sent it to me:
Dear Players, 
Acclaim Games is pleased to announce the start of Closed Beta testing for 
DANCE! Online, a massively multiplayer online dancing game (MMODG) that is 
free to download and play. With the start of Closed Beta, players will now 
be able to experience this fun and addictive online dancing game for the 
very first time. 
Using either a keyboard or supported dance pad, you can dance in an 
interactive music video right on your PC. By keeping in sync with the beat, 
you can perfect your dancing skills and compete in online dance battles 
with friends. DANCE! Online will also feature the hit music in a variety of 
styles and genres from the world’s hottest music artists. 
Closed Beta testers will be given an exclusive & confidential first look at 
the game, and are asked to report bugs and issues. Some features will not 
be available at the beginning of Closed Beta and will be patched in later. 
- Clothing and fashion items will be limited at first. 
- Certain Coin items will not be included. 
- There will be no initial dance pad support. 
- The included songs are merely placeholders for testing purposes. 
To participate in Closed Beta, you must first register at 
http://dance.acclaim.com. In most cases, you should be able to start 
playing the game instantly. We also want more girls to play this game and 
compete with the guys, so if you have a sister or know someone who might be 
interested in music, dance, or video games, you should invite them to play 
for free. Now get ready to DANCE!!!