Elgato just released the updated version of their USB tuner, the EyeTV. This new version has been resized (smaller) and added compatibility with Windows 7, making it ideal for that HTPC project you’ve been thinking about.
The new version is now clad in brushed aluminium, but is still capable enough to catch HD broadcasts over the air. EyeTV will also capture video feeds and record them via the bundled RCA adapter. It’ll even capture input from analog sources. Elgato has priced the new EyeTV at $150, and it should be available soon through the Apple store or from Elgato directly.