I just got an Asus RT-N16 and obviously I wanted to run tomato.
I backported all the changes of my build (PPTP/SNMP) to run on the tomato-RT branch.
This builds includes: SNMP daemon, PPTP client GUI (this version uses access-pptp client rather than pptp-client), and adds username authentication to the OpenVPN build as well as some (minor) improvement/fixes to the OpenVPN code.
I'm not sure what the best way to process on the matter as I can't push anything to the git repository.
If anyone is interested, or if someone is willing to push those changes, I can send you the patch stack (git format-patch) with all those changes.