I have been looking at Plack for several months now. I always thought it was a cool project, where "cool" means useful, good code, nice documentation, well structured, strong development "flow", etc...
Well, it has been two months since I first wrote about hippie. tme to continue. But watch the xdfighter video first! It was built with hippie by gugod, c9s, and me in an afternoon.
For the operation/monitoring purpose they need something similar to Apache's mod_status to see which workers is handling which URLs. He added that feature to Starman and Starlet, so the output of ps can show the status and requests in the terminal. He also hacked up Plack middleware for ServerStatus which shows mod_status like HTML in /server-status URL.
I added a Perl backend version of the SproutCore tutorial to the wiki. It was useful to see how Tatsumaki (the new framework by Tatsushiko Miyagawa) worked, and also because PSGI is quite fun to use!