a good start nixCraft, only that unfortunetly the vsftpd has lots of exploits vs to pure-ftpd.
And by the way I do not encourge using the anonymous upload issue, but using the users-base upload much better and more secure + easy to trace. Also I use the jail and use the local_root option to specify a fixed upload area.
Sticky bit and SGID are very useful here if you are using it for a group
