We have a FF forum here:
http://www.crappie.com/crappie/fly-fishing/
We have had a few tenkara threads. My experience with tenkara is limited, but I prefer a regular fly outfit for a couple of reasons:
1) To me, one of the greatest joys of fly fishing is the casting. "Casting" in tenkara is different and very limited.
2) I think tenkara shines in moving water where the water animates the fly. In lakes/ponds, you have to move the rod to move the fly, since there is no reel. I found this tiring.