if you get a desktop version though, its almost a gurantee that it will go to 3200 without any tweaking at all(no voltage increase). they dont even produce any extra heat(2 degree rise in temp is neglegible for 400 mghz increase)
i'd say that unless you're a power user you could save the 15 bucks and get the desktop version and oc it to 3200 with no problems. and because it will go to 3200 speeds w/o voltage increase of any kind, im sure they can overclock very well.
BTW, if you happen to have an nvidia chipset the multiplier is unlocked no matter what cpu you get.
as gipnor noted, the mobile requires a voltage increase to hit 3200 speeds, with this in mind, it is my assumption that mobiles dont really overclock any better, they just cost more(i have never tried a mobile though, so dont hold me to my word too tightly)
Also as he said, the NF7 is a great motherboard, i bought one for that 2500 and i had full range over everything.
i must also admit, the 2500 i got went into my girlfriends computer, so i set it at 3200 and didn't have any time to max it out.
I've got a book of matches,
I've got a can of kerosene,
I've got some bright ideas involving you and me.