Hi,
finally I finished updating all the batman OpenWRT packages. Additionally, you can find the tunnel kernel modul, the battools and batman advanced (layer 2) kernel module in OpenWRT now. You need the latest trunk to get these updates. We are already working on a backport to 07.09 kamikaze but I'm not sure that these files are included in the official SVN repository. Feel free to contact me if you have any thoughts / wishes / bugs on that.
Greetings, Marek