First, the overview: Its fully ANT+ Compatible (reads heartrate, cadence, powertap), it saves out standard Garmin .FIT files for WKO+/TrainingPeaks/Whatever, if you don't have a powermeter it'll save out a fit file with power by estimating your watts using standard trainer speed->power equations, it runs on MAC or PC, and PC has full 5.1 surround sound support. There are AI racers of various speeds you can try to pass, there are special interval modes (you program in a whole workout, or just ride around the scenery, or both) with voice prompts telling you when to start/stop the interval, and I built a from-scratch PC/MAC joystick for the front wheel to sit on so you can steer around the world. It also has a video playback mode where it plays most non-DRM'd videos but still has the interval prompts and graph overlays, but that is a bit flaky at the moment and its PC only (no MAC video yet).
Anyway, here's some screens of it in action (All screens taken at 1920x1080 with 4xAA)
Older screenshots (which show off how the workouts work)
Summary screen when you stop pedaling:
I should probably turn this thing into a product, but for now, it's just used by me. There's some more details on the webpage I made for it a while back: http://jmtc.ls1howto.com/
Lemme know what you guys think, and suggestions for things you'd like to see would be interesting to hear too.