I've been living with Windows 7 for some time now. Indeed, I've been using it since the first public release last fall.
At work, it has been my main machine for several months and I frequently bring it home and take it on the road. However, I have relied on my CNET-issued Windows XP machine for a number of key tasks, such as using the desktop version of Outlook and when I needed to access the Internet using a Sprint modem. (Our newsroom USB modem didn't work with the beta of Windows 7.)