Google groups thread
Bespin has the idea of multiple backends attaching to the same client. Right now, Python is apparently “winning” while Java has fallen behind and PHP appears to have faded away.
The situation is very analogous to Shindig (http://incubator.apache.org/shindig/) which has a strong Java back-end, a PHP back-end that took a long time to get started in earnest and AFAICT [...]
