Sonic Rush Adventure hands-on at Siliconera.

"Instead of playing with Sonic like everyone else I tested out the other playable character, Blaze the Cat. If you played Sonic Rush you probably remember her, she’s the purple cat on the left who can engulf herself into flames. The big addition in the Sonic Rush Adventure demo was 3D (gulp) sequences where you guide Blaze or Sonic on a jet ski. Using the touch screen controls you can slide the jet ski to avoid obstacles and hit ramps to do tricks. Playing the mini-game brings you to different islands and to the meat of Sonic Rush Adventure, old school, 2D Sonic."

Full Source: Siliconera