Flashed mine in the morning straigth to 900MHz kernel and DAMN! Fast like i wished this alwaysto be! I have lots of extras-devel stuff installed and all desktops filled with contacts, shortcuts and widgets, crammed up so to speak and this thing is really snappy.
I decided to flash the fw too after the speedboost made me greedy and it helped some and also fixed my annoyingly slow file manager.

After a days use, no increased temp as far as i can tell and the speed boost everywhere makes me a happy owner INDEED.
After the pr1.2 i believe this thing will truly be the king of the hill!

I will at some point try the 950 or 1000 just for the heck of it