Confirmed by Paul Thurrott and by Neowin. Windows Server 2003's final build number is 3790. If you are a Windows tester for Windows Server 2003 the evaluation version is sitting for you as we speak at Windows Beta Web. Below is a screenshot of Windows Beta Web with the current download available. Minor problems with key allotments and slow download speeds but its there.
We'll let you know about anymore developments and more screenshots as we get them.
Updated: This just in, no complimentary copy for beta testers - Please note CD media will not be made available. As in past server betas, only evaluation versions of Server 2003 will be made available to members of the technical beta. Final packaged product will be available on store shelves on or about 4/24/03
Screenshot: View build 3790 download