We give a lot of attention to XBMC here, and with just cause. It's an open-source, cross-platform, highly-customizable media center solution that outperforms just about every commercial option out there. Here's how you can make it even better.
If you've played around with any commercial media centers or extenders, you've probably quickly realized how clunky and inelegant the user interface and experience is. Sure once the movie is playing and you're no longer staring down the interface all is well, but prior to getting to the actual showtime the menus are ugly and the navigation is kludgy.