Where can I find a client for managing VMware Server 2.0?

VMware Server 2.0 comes with a web interface as a main management interface. There are however fat console clients installed through the browser. You will typically be able to find the fat console client in ~/.mozilla/firefox/$profile/extensions/VMwareVMRC@vmware.com/plugins where it's called vmware-vmrc.

If you have a windows based pc you can also use a full fat .Net based client which is the same client that is used for managing ESX. If you have a linux based host with VMware Server you can find the fat windows client in /usr/lib/vmware/hostd/docroot/client/VMware-viclient.exe