Playing all the rondel games back to back has really made me appreciate how much I like the mechanic.  Now I'm beginning to freak out about The Princes of Machu Picchu.  It's like an expansion on the rondel, with King-of-siam-like end conditions, and if the pictures from Essen are true, enough wooden llamas to blot out the sun!  If there's one thing you can count on from Mac Gerdts it's that multiple trees will have to be felled to make the copy of your game.