Ok, I'll hop in as well...
(I'll edit this post later on if I add something or anything important comes up).
Machine as mentioned in sig:
Normal Use:
HD: Both HDs at 48 Celsius (according to DTemp).
GPU: 56 celsius, 54 celsius ambient (according to Nvidia control panel).
CPU: ??
Gaming:
No Data yet.

...Now, everyone, join the temp reporting frenzy here

[edit]
I took off the CPU temperature info, I concluded it was wrong, other temps I have mentioned here were the same when testing with Everest as well (couldn't see any temp info for the CPU there unfortunately).
[edit]