I'm planning to build a 29" SS sometime in early '09, so I'm doing my research. My first thought is to go with something like a Surly Karate Monkey; steel, proven, and most importantly, affordable. A friend of mine suggested that I consider a Vassago Jabber Woky, as pricing is still (somewhat) reasonable by comparison, and the drop outs require no chain tensioning device. So I took a look at Vassago's site, and it seems as though they are not kidding when it comes to bucking the norm with frame geometry design. Their "wet cat geometry" utilizes a long ETT length and also longer chain stays (which must certainly= a longer wheel base).
I tend to use more body english to manouver my bike through tight restricted single track, so I'm concerned about how larger 29" wheels and a longer wheel base will handle in a "tight" situation. Please, anyone with an opinion on this, post and let me know what you think.