There will be a few Preslers... and only 1 is an Extreme Edition, which is the 955XE. Then The other I know of is the 950, which supports HT, but is not a EE. Other then that, not sure but I think there is probably a 945, and maybe 940. A lot of guys that have good contacts have already got their paws on the preslers, and they are gooooooooooood clockers for sure
I've seen a couple 950's at 4.5-4.8ghz on air(ES, but, still!) and then 5.2ghz with a 955XE with water.
And the best so far has been Fugger, with a 955XE ES.....6ghz on a modded Vapochill LS.
So, these might have some life in them....for sure
Oh and BTW, if anyone is wondering when the 965 chipset and Conroe core are coming out, then are expecting them in July of 06..a bit far away, but should be worth it