I've been beta'ing ErgVideo's Threshold Test ride for the CompuTrainer. It's pretty nice.
You get a 26min warm-up based on your expected Threshold, including 10min wind-up, 5min at LT and some intervals (2x45s & 1x60s at >Threshold). You click a button and can recalibrate without playing with wires. Then it automatically drops into a 2% grade 3D course for 20min or 60min. At the end, you get a file saved with your Threshold calculated (the 95% for 20min and 100% for 60min). You get a pacing video to watch all the while and can play tunes from iTunes, Media Player, etc, all within the app.
It should be released in a a week or so at www.ergvideo.com. Well worth a look-see for the indoor season. It also makes routine testing mindless, even if not painless.