We started off at my company with two Windows 7 x64 seats, to upgrade from the company-wide XP x32. We are the only two Revit users, so we wanted more than 4 GB RAM. The first problem was AutoCAD 2007 is the standard for the rest of the company, which could not be installed in the 64 bit environment, so it has to be run in the 32 bit virtual machine 'XP Mode'. I quickly made the transition to AutoCAD MEP 2010 x64, but that didn't solve the second major issue. Originally, I was told that all Vista drivers would work with Win 7. Not true, as is the case with our (2) HP Designjet 1050c plotters and our HP Designjet 4000 plotters. HP's website posted the drivers for the 4000 to be available in March 2010, with no expected driver support ever for our two older plotters. The equipment works great, there is no way a small firm could justify trashing it to buy new plotters with driver suppot. How could HP and Microsoft leave customers out in the cold like that? Moreover, there is an article about Windows 7 in the 'sponsor spotlight' this month.
http://www.augi.com/publications/hotnews.asp?id=2051
With the link at the bottom refering to HP's website. I really like Win 7 (I immediately bought 3 upgrade licenses for my home computers), but this article, touting the benefits of Win 7 and HP's integration with their new products makes the driver issues more insulting to those left without support from two VERY large companies. Aside from the drivers and the pain of using a virtual machine for any 32-bit software (load calc. programs), Win 7 is a great product, no issues with crashing or the like.
On a side note, my MSI wifi card on my home PC didn't work with Win 7 and had to be replaced with a new card. I spent $50, and moved on. But Plotters worth $5000 or more?