I use a W2K3 Server as a desktop (upgrading from WinXP).
It's far more stable and in addition, has IIS6 and WSS
built-in. Feed it more memory (>1gb) and it'll do more
wonders. Kevin Moore had a posting
about using W2K3 as a desktop and there's a site ('msfn.org') that's also a source of info on this topic.