The one I have carries USB power out on the VBUS pin. I think there's a 350ma limit (probably the Pololu's power requirement from 500ma). Your's doesn't have that?
sure, so i had an initial hour of failure while I figured that out and now I have an extra clip-on lead carrying the power. I may jumper it at the programmer so the icsp does the whole job. It's moot for the smallest chps because you pretty well have to remove the icsp clip before running your program.