Not a lot of mesh help out there it seems.
I did run a mesh for a while but ran into issues where some nodes would 'break' and require a reboot to rejoin the mesh. Sometimes it got so bad the whole mesh would collapse.
However, it is quite nice to have your network self-route, self-heal and be on a simpler layer 2 basis. I might try again now that RouterOS 6.13 is out. I tend to use NV2 rather than 802.11 and I seem to remember I didn't need WDS entries at all either!
Your "head end" needs to be designated as a "portal" or "root" node. This will get packets to IP addresses that don't have a corresponding MAC address in the mesh to be forwarded on to the portal/root node by default.
There's no support for routing based on the bandwidth between nodes but you can coarsely tune routes by using your wireless access/connect lists to prevent poorly performing links.
There are other resources in addition to the Wiki, like presentation videos at http://www.tiktube.com/
Report back here and I'll do the same as I try meshing again.