i've been on holiday so didn't get a chance to vote in this poll.
for us it is VERY important. We cannot afford to upgrade our server to windows 2003. We would really like to upgrade Plesk 7, so for us, we need an older build.
I voted no because there are valid technical reasons for not supporting Windows 2000. Go grab yourself a book on IIS 6.0 and read up.
The biggest one is that IIS 5.0 and 6.0 are different enough that you break all the good things about IIS 6 when you try to write a piece of software that will install and work on both.