I just jumped on the Win7 Bandwagon about a week ago and joined this forum today.
I do however use XP as my everyday OS as it purrs right along as usual. I run it on a separate hard drive. As the others have said, Win7 is a beta and prone to have some bumps in the road. Here for anyone's reference are the issues I have encountered so far.
Office 2007 - Works like a champ, no issues
Utorrent - Works fine, only issue is I don't get a green go light. I have the firewall turned off and everything else, port is forwarded and shows good. I get normal DL speeds none the less so it has become a non issue for me.
SIIG AP-10 SCSI - This controler card is OLD and I use it to run my OLD flatbed scanner. I can not get the driver to load in Win7 no matter what I try, yes I have stood on my head, no voodo dont work either. I use this scanner only when the Moon of Endor is visible in the nights sky; so I just boot up Win XP when I need it.
Adobe Reader - Has worked fine up till the other day. Whn viewing a PDF File within Firefox Adobe Brings up a window with no information except an OK button. Clicking the button closes Adobe. Runing adobe to veiw a PDF file as its own (not within a browser) it works fine.
I want to offer a tip to all who use Office 2007; Outlook 2007 specificly. When operating 2 OS systems and trying to do email it can get real frustrating becuase you can be on one OS and need an email that is on the other OS. Outlook stores all the data for your emails in a .pst file. When you install the Outlook on the second OS point it to the original .pst file on the hard dirve for the first OS. This way both use the same data and you wont worry about loosing/needing an email. Incedently keeping that .pst file on a hard drive that is used for files only is a big help as you never worry about loosing it acedently when you forget to back it up and wipe your drive to install the OS again.