I've been a long time m0n0wall user and have tried the 'modern' alternative 'sense's. They have their use and place, (one more than the other

).
I do miss the leanness and simplicity offered by m0n0wall and think both t1n1wall and smallwall are good continuations. However you would do better to combine your efforts and have a single project. I would be glad to sponsor some development of features I'd like to see (while keeping it light weight).
Really the only addition's I'm looking for is to bring over some additional configuration fields/options for the DHCP server for reservations, and have the phase 2 components of IPsec separated out from the phase 1 so that a phase 1 can have multiple phase 2's.