http://reinerstileset.4players.de/englisch.htm
So far I've converted all the buildings (bar House A which is just a more complex HouseC/D) to s3o. Textures are unchanged from their original sizes and PNG format - I haven't added the alpha for teamcolour.
I'll be releasing them under the same 'license':
Everything here is Freeware, and can freely be used to create Games, etc. . No need to ask for permission.

You can expect them soonish.
I plan to do the trees too, though they will take longer (I have to double up the leaf faces, and combine multiple textures into one and resize the UVmap accordingly, and do a texture2 alpha). Any help with redoing the textures for the trees would be greatly appreciated.
On a similar note, someone with more money and mapping talent than me should buy Treemagik G3.