The Nikon D7000 has received an unnofficial firmware update that allows you to get around the lowly record time limits for video. The Nikon Hacker team now has lifted the limit to 25-30 minutes for the D3100, D5100 and D7000 cameras. Note that this is an unofficial update and not sanctioned by Nikon. use at your own risk.
[Nikon Hacker via Nikon Rumors]
I feel like this would be a bad idea, as the time limit is set by Nikon based on the sensor’s tolerance. The sensor can be damages if overused.
I was under the impression that the time limit is a factor of the license compression codec and the overall finished file size. I can’t remember where I read that though.
I could be wrong, but all I am saying is that any firmware update I put on my D7000 is going to be created by Nikon, and Nikon only.