I have to agree with the many who say do it like Mac and Firefox. Just have updates and upgrades every so often but don't come out with this entirely new OS, which causes everyone to install them on each computer and relearn everything. Wait...installing on each computer. That sounds like it would make Microsoft a lot of money.
The new Mac update is supposed to cost $29 per computer, and even less (per computer) for a 5-user license. My several Macs at home should be pretty cheap to update.
On the other hand, I just dread finding out what Windows 7 is going to set me back for my half dozen office machines.
