64-bit, done and done... I'm using it in RC form right now and have had 0 issues with drivers, apps, games, whatever. 64-bit is the future, bring it on.

With 12GB of DDR3 RAM..., 32bit is not a choice.

Using 64 bit almost-RTM version. never had too many problems with 64 bit.

I switched to 64 bit when I was using vista, not long after it launched. There was quite a bit I couldn't do at the time, but most of the driver makers seem to have caught up now. Using the windows 7RC in 64 bit now.

64-bit absolutely. I'm not cutting my 8GB of DDR3 1600!

When (or if as I have Vista Ultimate and can't afford the ultimate version of windows 7 this time around) I decide to upgrade to Windows 7 I'll certainly stick with 64bit. The extra ram is well worth it when you can turn page filing off.

64 bit here. Have been running 64 bit since vista was released. Purchased a copy of vista 64bit ultimate. Will be buying win 7 64 too.

64bit Ubuntu

64-bit you have to encourage the change although not completely necessary as 32 bit seems to generally fill most people needs in system requirements and specs the extra push to 64 bit would fill everyone's needs although with a little extra cost of computing power but hey most problems with 64 bit anyways is finding the alternative or compatible 32 bit version to work on it anyways.

64-bit - now lets see if we can make the application writers catch up to the modern era of computing.

64-bit. Why would anyone limit themselves on a 32-bit platform anymore these days?

32-bit. I ran 64-bit Vista on my CB Desktop since it came out and was super happy with it. But my new Sony FW Notebook has only 3gb of Ram, and since 64-bit doesn't actually increase performance short of a ram shortage, there isn't really any reason to not use 32 at the moment. RMclock is much easier to deal with in 32 as well.

That said, 32-bit W7 RC has been running AWESOME for me. Love it. It's as stable as Vista, but with some nice UI changes.

If there is 32bit program compatibility, and for desktops I'd probably prefer going 64, having the future in mind.

That would be a first for me!
For notebooks and netbooks 32bit for sure!

I'm not sure as to why the Atom processor supports 64bit. It is a nice feat, but mostly unused,and perhaps unnecessary for 95-99% of the people owning it.
A 64bit OS makes little sense on a device that tries to save battery.

But for desktop, yes!

64-bit. Honestly they shouldn't even have a 32-bit option.

I'm running Win7 RC 64-bits and loving it, it has been a great experience, no driver problem at all except my old logitech keyboard and mouse that I am about to replace anyway, and with another 6GB of DDR3 1333 coming the choice is easy and clear, as someone said up there, 64 bits is the future.

I loaded 64bit RC1 at home, mostly to try it. If I switch to W7 at work, I'll go 64bit because our CAD apps can certainly use more memory. At home I would probably go with 32bit.

64 bit anything less is unacceptable, i would take 128 bit if it was out yet but it isn't .

Already using 64-bit Vista since launch. Farewell 32-bit!

32-bit. i run nothing that needs more than 3 GB and i don't want to deal with hardware where companies don't make 64-bit drivers work properly.

x64 and lovin' it already!

64 is the only good way to go inless your upgrading from an old computer

32-bit, even though my lappie came with 4GB and I'll tell you why. My laptop came with vista 64-bit edition and it worked ok. No major problems at first...except for some old programs and tweak applications would not work...And almost all of my programs were running in x86 mode--they ran a bit more buggy and would crash sometimes for no reason. I installed win7 32-bit, every works as it should and not a single application crash. Maybe when applications catch up I'll switch, but I've tried both and that time is not now.

Gotta have at least 8gb to check my email, so of coarse i'm going with the 64bit.

64-bit, though there's really no point to it as things stand right now.

We still won't need more than 4Gb for the foreseeable future and with Microsoft's choice of releasing a 32-bit version of Windows 7 there won't be any 64-bit software for this OS either.

Why would any company bother producing 64-bit software when 32-bit runs on both systems? Barring driver-related software, obviously.

64-bit is the future, never doubt that, but until Microsoft release an OS that doesn't support 32-bit other than for backwards compatability it will remain the future instead of becoming the present.

64 bit. I using windows7 RC right now, I had one 32 bit app I need to use and was able use it in the xp mode.

64-bit, though I really shouldn't bother.

I won't run more than 4Gb for the foreseeable future and with the 32-bit version existing, and thus precluding any release of 64-bit software unless drivers require it, it's likely going to remain future-proofing for a future that's a long way off.

Not even Vista should have been released in 32-bit flavors, my 2003 CPU had no issues running 64-bit code nor does any computer sold in this day and age.

I haven't decided yet, but probably 64 bit. My main concern with 64 bits will be extra bugs and loss of frames while gaming. Does anyone else share my concerns?

If i ever plan to upgrade to w7 from vista i will get 64bit.