Google released a stable 64-bit Chrome today for Windows. You can download it from the main page by selecting the Windows 64-bit build. It upgrades cleanly over the 32-bit version.
It’s really fast but not always pretty.
The bad news: Font rendering isn’t as sharp as IE or Firefox. I’m not sure why, and I’m not the only one who’s noticed. Fire it up next to another browser and visit the same site and you see the difference. There’s a setting in chrome://flags for LCD text antialiasing but disabling that made it worse. Depending on the fonts, some pages look fine. Sometimes changing the size by hitting ctrl-+ helps.
Update: Setting the flag to LCD text antialiasing didn’t help much at first, but when I left it that way overnight, font rendering mysteriously improved. I still don’t think the rendering is as good and clear as Firefox but it’s usable.
The good news: The developers weren’t kidding. It’s the fastest browser I’ve ever seen, with no tricks or tweaks.