A Movie Catalog feature has always been an important part of my HTPC from the time I started and used Meedio through Beyond Media all the way to SageTV now. I think MyMovies for Microsoft Media Center is one of the better Movie applications for HTPC's and Adam Thursby of the Entertainment 2.0 blog has done a great walkthrough of MyMovies for Media Center. I can do many of these things in SageTV, but I'm hoping to see a few more of these features show up for SageTV in future versions.
Check out this great ScreenCast of MyMovies by Adam Thursby:
Adam has also begun a Media Center Podcast - I checked his first one out yesterday and added it to my list of podcasts to follow.
via Entertainment 2.0's post on MyMovies