I was an 'early adopter' to buy the sn41g2. Having now had that over a year and some change, I can say that this is a good case and board.
The one caveat to this system: the onboard graphics. It blows for gaming. Period. I have heard people say it works for them, but I am a fairly serious Wolf player and it did not come close. I stuck with my ti4600 (which had serious cooling problems in this case... I cut a hole over the fan which helped a bit) and just lately moved to an ATI 9800 standard card.
That said, if your not gaming, the onboard should work great. It comes with S-video out so you can hook it right up to your TV and watch your movie 'back ups'. Beware, as pointed out earlier, when using on-board graphics the memory brand/quality can be an issue.
There are rumors that the ATI cards don't work right with nForce2 chipset. My experience shows this is bogus. I have no problems at all even after overclocking.
Serious M/B overclocking cannot be done easily as the multiplier is locked but you can increase your bus speed to get some OC. As for me it runs around (working from memory) ~5300 in 3dmark03 with the 9800 overclocked via the Rage3d app and the bus speed turned up. I am sorry I don't know the mem speed or processor I use but they were top of the line over a year ago (Geil 1GB in 2 matched sticks). I'll update this with that info tonight.
Long story short: I like this system a lot. The small size is great for lan parties and use at home (IE an entertainment center). I never have needed more than the 1 PCI slot (already has USB, firewire, sound, NIC, etc. built in). The built in sound is great, I have never had noticed the crackling or static mentioned here and other places, and since I use headphones I would think I would hear it.
Anyway my $.02. Hope that helps make a decision.