The Fiire effort with Via was excruciating. Always close but not there. Took forever. They claim they will make the source available under NDA but that may also be a trap. Until they see a few 100,000 chip orders it will be hard to make progress.
The target platform for now would be the CX700M. It has the most processiuong power and is used the FiireStations and is available in the EPIX boards. Via should have a new chipset any day now that will support all the formats for video- H.264, VC1, MPEG2 etc. in HD.