The latest verion of sudo is 1.7.2p1
The "authoritative" sudo ftp site is ftp://ftp.sudo.ws/pub/sudo/
and there is a web page at http://www.sudo.ws/sudo/

File:			Description:
=====================	===========================================
sudo.tar.gz		Link to the current version of sudo
sudo-1.7.2.tar.gz	Sudo version 1.7.2
sudo-1.7.2p1.tar.gz	Sudo version 1.7.2p1
sudo-1.7.2p1.patch.gz	Patch to update sudo 1.7.2 to 1.7.2p1

Note that these archives are compressed with gzip, if you don't
have a copy of gzip, download and build gzip-1.3.13.tar from the
"misc" subdirectory.  To unpack an archive, run:
    gzip -dc sudo-1.7.2p1.tar.gz | tar vxf -