Capture multiple streams with USB 2.0 device

[mdflick]

I'm coordinating A/V for a lego robotics event. During the event I'd like to save to hard disk all the video from 2 (maybe 3) cameras. I'm thinking of getting a couple of usb 2.0 hardware MPEG encoders - Hauppauge WinTV PVR-USB2, ADS DVD Xpress (USBAV701) ... Tight synchronization between streams is not an issue and only simple audio is needed. This is a burst application - record for about 3 minutes then we have some free time.

Does anyone have experience capturing two streams on one machine. The hardware should be fine - not clear how tested the software tools are for these consumer devices. Environment is WinXP on a 1.5 Ghz Thinkpad or 3.0 Ghz ThinkCenter.

Imaging away / flick

[reboot]

Hook up as many USB devices as you dare.
Find some software that allows capturing from multiple sources at the same time (gbpvr works with Hauppauge devices extremely well).
Turn off all unneeded services, and applications, so that the hard drive is NOT going to be busy doing anything but recording.
Pray that the system can sustain the data write rate needed for multiple stream writes simultaneously.