I don't think I would have enough time to lead a team for a while. The team I am leading now has 6 full time programmers and about 6-8 artists.
However, if you do decide to use Ogre I would like to participate as a contact and would be willing to answer any questions I can. And maybe later on down the road I can help code as well when/if I get more time.
Are ya'll planning on going commercial with this game? If you intend to keep it free, there are several networking middlewares that are very easy to use that are free for non-commercial use(freeware projects)
The one I'm using is called ReplicaNET
http://www.replicanet.com/
It's very very easy to set up objects to be replicated over the network, and handles prediction and quite a few other useful features for you. You just tell it what variables of a game object you want to replicate and various parameters of each such as the max error, and distance that it starts scaling off bandwidth usage.
Anyways, I'd love to help, even if its just as a consultant to start with, and hopefully help out in code later on.
Heres an newer-ish shot of our game. Terrain has temporary texture and theres 3 different versions of the Ogre model shown.
http://www.bsproductions.net/foxbot/dl.php?4fd29
It isn't shown here but due to the way the mesh is set up we can mix and match the various pieces of the ogre mesh to produce a wide range of armor configurations.