>>> I'd imagine few users are still running NT4 workstations; they are typically power users who would have upgraded to W2K or XP long ago. <<
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>That might be what you imagine, but in fact there are lots of companies still running NT 4. Contrary to what Microsoft would have us believe, many companies don't run right out and buy the latest version any more. They have come to realize that the cost of upgrading is significant when training time and learning curves are factored in. And the track record for stability in new OS versions is less than stellar.
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>Mike

On the heels of Mike's comments, we have clients that are corporates and banks. Right now I can think of one corp that is still on Win95 and another that is on NT4. Selling the OS upgrade is quite a big deal because IT departments like having all workstations to have the same environment so as to make their support life that much easier. The "power users" might have the really sexy hardware but their OS will be the same as everyone else's in the company.

So right now we are polling our client base to see what OS they are running and then we have to decide what to do with the ones who are on 95 or NT, in terms of forcing them to upgrade or not.

Laterness,
Jon