MusicCenter widget for iOS5 Notification Center is now available in Cydia on WrightsCS.com Repo and is FREE!
Add http://cydia.wrightscs.com/ and get the widget now!
Also keep in mind that iOS5 is a very early BETA. So this widget is offered FREE of charge. Although it has been tested well, it could probably break with the next BETA release of IOS5, but will actively be updated accordingly.
If you enjoy this widget and would like to see more useful widgets from WrightsCS, consider making a donation!