Websites for the PVR Enthusiast
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BYOPVR
(www.byopvr.com)
Build your own PVR (byopvr) is the best place to go if you want to build a home-brewed PVR. They have forums, reviews, and give away prizes from time to time. The forums are very helpful for debugging problems that come up when you're setting up software on your system. Also be sure to check out BYOPVR's wiki.
Mini-ITX
(www.mini-itx.com)
News and reviews about anything involving the mini-ITX form factor. They have a big listing of creative mini-ITX projects. They also have an online store for mini-ITX motherboards and cases.
Zap2it Labs
(labs.zap2it.com)
This site is used by some PVR software to download local TV listings for your zip code. This site can be used with GB-PVR, which can be set to automatically download new listings every few days.