1) I have a 800d because it looks awesome, and i'm upgrading MB/CPU when Sandy Bridge comes out in the new year.
2) In my HAF 932 the NB ran a ton cooler because there was a fan pointed on it. So I don't think there is a problem - just need to put a little fan on it. My board is getting sent out for RMA though, so we'll see if the new one runs cooler, but I doubt it will.
I'll take a look at the tape idea, thanks!