You'll find pretty sound support for the WD Scorpio Blue drives as well as the Seagate Momentus. If you want 7200 RPM you'll have to opt for either the Seagates or something else as the WD Scorpio Blacks currently max out at 320 GB.
FWIW, I installed Seagate 320 GB 7200 RPM drives in both my Macbook and Mini and they're working great---very quiet with no issues. I'd suspect the 500 GB would likely perform just as well.
Just installed a 2.5" Seagate 500 GB 7200 RPM SATA II in my Macbook Pro. It's running quiet, cool and fast. Purchased an OEM unit from a local computer retailer for $106+tax
I'm in the same boat. I have the stock 120 GB 5400 RPM in my Mac Mini at the moment. I see a lot of people like the WD scorpio blue drives, but is that because they are a cheaper $/GB pricepoint and currently higher capacity than the WD scorpio black drives? I would think that most would want a 7200 RPM vs a 5400 RPM drive.
But even at the slower RPM speeds, the blue performs even better than the stock drives that comes with the Mini? Or are you really getting the blue primarily for capacity reasons?