I assume you mean XBMC, the free media center application/OS? If so, I run it myself on my HTPC, and it's a fantastic little program. I'm not sure if you realize this however, but you provide your own content with XBMC (if you're not going to use plugins, of course). All it does is catalog and tag your media for you.
If you already have your own content server and want to organize, catalog, tag it and watch it remotely, XBMC makes a fantastic front end.
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