The good/bad news post is from last season, and I believe fixed. Though I didn't personally verify this, I did file the bug report.
The camera exposure settings for all MS LifeCams seems to be odd on UVC/linux devices. The parameters are described and given ranges that various APIs will use to communicate requested properties to the camera. The MS LifeCam exposure is described as going from 5 to 20,000, with increment of one. That is a lot of range.
http://comments.gmane.org/gmane.linu...uvc.devel/5717
That link is to a 2011 forum post about a lifeCam 5000, but explains the same behavior. I does list the magic values, which are twelve geometrically scaled numbers centered around 156. I don't have a camera to try, but if you can use the percentage equivalents, or make your own Set Exposure to avoid the floating point scaling, you can probably make a LifeCam specific Exposure VI work.
Greg McKaskle
FIRST is like we have traveled to the future, and we dont like what we saw when we got there. So we came back and now we are attempting to alter the future - KenWittlief [more] 
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