We're still in the early stages, but it sounds like you are thinking
along the same lines we are and it sounds like you have a lot of good
knowledge.
Right now our plan looks like this:
Goal 1: Accomplish most basic meshing possible on some small number of
nearby physical nodes.
Goal 2: Figure out what to do next.
Several of us already have some WRT54G's lying around and since
they're fairly widely used we're starting there. I think we're
currently deciding what firmware / protocols to try out first. We are
leaning towards BATMAN, but OSLR might be good too.
I just found out this morning about a different piece of hardware that
looks pretty nice: http://wiki.openwrt.org/toh/tp-link/tl-wr703n and
they're fairly cheap: http://www.ebay.com/itm/200730884736
I was considering ordering one and putting OpenWRT on it and see if I
can get it to talk to my WRT54GL.
I know some others have also mentioned the Ubiquiti hardware which
looks pretty sweet, too.
Right now, we have been meeting irregularly at Hive13 meetings on
Tuesdays. Last time we talked we said we would try to get together
again when we have 2 or more nodes to try to mesh together. You
should stop by Hive13 on some Tuesday night if you're interested.
~Dave
~Dave