The specs will be comparable to those of CSI3, which are:
-1GHz processor or better when using a video card with hardware T&L (2GHz or better recommended). If your video card does not have hardware T&L, the processor needs to be at least 2GHz (and not all non hardware T&L cards are supported).
-256MB RAM minimum (512 recommended)
-64 MB DirectX8.1-compliant video card. If you're wondering about a specific video card, let us know what you have and we'll let you know if it works. (Any 3D-equipped card from the last three or four years will probably be fine.)
Sam & Max was developed to be a downloadable game, so we've kept file size in mind. I don't know exactly how big it will be or how much hard drive size it'll take up, but the download size will be comparable to the Bone games (which are around 50-75MB downloads). We're not talking a huge game, by any means.
If you buy the game and it doesn't download correctly, of course you don't have to pay for it again.

In fact, if you download the game, play it, and then remove it from your hard drive for whatever reason, you can download it again for free. Once you've bought the game from us, you own a license to it.