The 1.6.3 update adds two major features:
The T1i, or 500D for our European friends, is now fully supported.
Previously a number of Canons (notably the 5D II) did not display the live view feed while actually recording. This has now been fixed and live view continues to update during recording. Additionally we added a "Movie Restart" feature within the settings. Each camera has a different maximum video record length due to legal / technical limitations after which recording stops. Now within the settings you can tell recording to automatically stop recording and then restart automatically before that limit is reached. You can set the restart to occur at 10, 19, or 29 minutes. Based on our testing about 2-3 seconds of video is lost during the restart.