Bowulf recently had something to say about Windows 2003 Server. Specifically that:

It is definitely an evolutionary step forward from Windows 2000 SP4 security not a revolutionary one.

He’s commenting on this O’Reilly article.

Overall I agree with Bowulf and with Mitch. It’s a good OS with some good and bad upgrades. It’s a bit of a shift in thinking, but not so much as some people might think. We’ll be beginning our ramp-up to full W2K3 in the next year or so, and I’ll have more hands-on comments then.

For now I’m more inclined to go with Evolutionary.