Eventually our customers will be running it. We've tested our apps on it successfully, so no real reason for us to upgrade yet. IF it can run in a VM, I'll probably buy a copy a year or two down the road. The cool thing is, we support our apps on Windows, Linux (Ubuntu), and Mac OS X. Many of our customers are switching to Macs and some are starting to use Linux. Only one has definite plans for Vista this year.