The new games are waiting on the new Ovi store which WAS supposed to launch in April according Digital Chocolate:

"
+ Digital Chocolate: 4 Million Downloads on Nokia’s Ovi Store

07 April 2010


Digital Chocolate also announced that the company will soon bring Jurassic 3D Rollercoaster Rush™, a top-selling franchise, to the acclaimed Maemo based Nokia N900. Digital Chocolate has added special OpenGL ES 2.0 3D graphics to optimize Jurassic 3D Rollercoaster Rush for the Nokia N900’s large WVGA touch screen making it the one of the best looking games available on any mobile platform. The game leverages the Nokia N900’s accelerometer feature allowing players to easily accelerate and brake by tilting the device to make the carts go faster and slower. The game also features a two-player multiplayer mode over Bluetooth. Jurassic 3D Rollercoaster Rush will become available for download in the Ovi Store in April."

http://www.symbian-freak.com/news/01..._ovi_store.htm

Oh well, they only have a few more US hours of April left to meet their target launch.....