I've finished my first ten cranes and distributed them around the city! I've left one of them in an origami book, but most of them are left in semi-public spaces where someone may find them, in stores and restaurants. I wrote the blog web address on each one, so its actually quite likely that you found out about this blog via such a crane.
I would have folded more cranes by now, but I have been distracted by another project. Specifically, I have been tracing crease patterns of all the folds that I know and cataloging them in a 3-ring binder so that I can compare and contrast different patterns.