Recently my Mini 9 wouldn't boot up to OSX Leopard (it was stuck on grey apple with spinning wheel). I figured it was time to update to Snow Leopard anyway so I put that on (after toying around with the newest version of Ubuntu). At first everything worked, and then the wireless stopped working for a couple of days, before coming back on (it's currently working). I've noticed that the Mini is much hotter now as well (I can feel it through the touch pad). I've also gotten a kernel panic once, which never happened under Leopard. Installing coolbook, I can see that it's idling around 37-40 degrees.
Any thoughts about what could be causing this? Bad wireless card? Bad MB? Detached heatsink. Does this sound familiar to anyone who might know where to start?