While the keynote address at Macworld Expo garners all the attention, Apple usually pushes out a few other updates at the same time that aren't as exciting. (The 802.11n AirPort Extreme Base Station wasn't mentioned at all last year; see "AirPort Extreme Updated," 2007-09-07.) This year, Front Row and iMovie received the silent update treatment.
According to Apple, iMovie 7.1.1 "addresses issues when publishing movies to a .Mac Web Gallery, improves overall stability, and addresses a number of other minor issues." The update is available via Software Update or as a 16 MB download.
Front Row 2.1.2 receives even less description, noting only that the update includes bug fixes and improved compatibility with iTunes (presumably to handle movie rentals). The update is also available via Software Update or as a 16.8 MB download.