Well, I downloaded and installed Filezilla last night. Looks like a nice server, but the sercurity is more involved that I'm looking for. You need the Windows Cerberus stuff installed, and that's too much to ask of 99% of my client base. I need something that will allow them to use one of the popular FTP programs (FTP Voyager, Cute FTP, etc.) without having to do anything else to their PC.
What about
RaidenFTPD? Has anyone ever used that? It looks to have a lot of the features I want...