I've downloaded the port too. I've tested several things so far:
- long shutter speeds work (tested 20, 30, 60 seconds)
- all temperatures are shown (can't tell if they're accurate)
- RAW doesn't work (didn't actually test it, it's a known issue)
- HDR.bas script takes the first image, then camera freezes (didn't test other scripts)
- a minor color corruption of the original Canon menu tabs (same goes for CHDK splash screen)
- minor features work (file browser, calendar, etc.)