I think it's good to hear more positive stuff about 29", I haven't read too much. But, how tall are you? I am 5' 9", and also ride a 26" StumpJumper (19" frame, I think?). I tried a friend's new Whyte 29" (don't know model name...), we swapped bikes and rode a local trail, with technical switchbacks. I found it so difficult to get the larger wheel around tight corners, but will admit it was fantastic down the smooth, not-so-tight section of the trail. After swapping bikes a few times, and doing the same trail, I still believe 26" is the wheel size for *me*.
I think the size and style of the rider have more to do with whether it is right for you than "Oh look, big wheels go over stuff smoother". So, are you a big build? I'm a much smaller climber type build and I don't think it mixes well with 29ers...
Edit- I ride a 17" frame, no idea why I posted 19", might be the road bike or something.