I've bought a new C compiler from CCS yesterday. It is a complete IDE for C to the PIC. The Altimeter project has been in hold, waiting for this. Included is also a RTOS (Real Time Operating System), which I plan to use. Mostly because I want to try it.
CCS has a lot of HW support built in, and a good examples library, so hopefully I'll be up and running soon. The current code has to be ported from HiTech C to CCS, but that shouldn't be any problem.