CAgames have released a preview of there new game Marbol. The game is currently Mac (OSX 10.3) only, and so far there are no plan for a DC version. The game is based on Ganksoft 's demo on the DC Tonic disc (a Demo CD released at E3 2001, containing a number of contributions from the DC homebrew community and a full development kit based entirely on free software.)
CA Games are the developers of the game Feet of Fury for the dreamcast, CA Games current Dreamcast Project Tryptonite is still being developed but there is no news on a release yet.