In addition to the Nikon D3100 and D5100, the Nikon Hacker team was able to remove the time limit restriction during video recording also for the D7000. The new firmware was tested and is now released – it allows for 25-30 minutes uninterrupted video files (up to 4GB in file size). For instruction and download links, check this post. Please note that this is not an official firmware update from Nikon – use at your own risk.