For a view of all packages and file releases, check out the files on SourceForge.
FTPfs is also mirrored on planetmirror.com, both HTTP and FTP.
The latest release is ftpfs-0.6.2-k2.4 available here.
There's also a kernel patch(ftpfs-0.3.0), built against 2.4.4 but might very well work for other versions.
If you're still on kernel 2.2, you'll need this package (ooold!).