During the last days i wrote my first external: fsm - finite state machine for pd
I wrote this with algorithmic sequencing and sequence recognition in mind.
You can find builds for win32, osx and linx, as well as the sources and help-patch with examples at http://floppy35.de/pd/
I didn't test the windows and linux builds (but osx-version seems to work fine),
so please tell me, if it works or if it destroys your machine and deletes your
mp3-collection.

Unfortunately i saw a bit late that moocow had a similar idea earlier... however, my external seems to be a bit different (low-level approach), so it might be still useful for some of you. It's written in plain C and consists of one single c-file, so it should be easy to port and compile for different platforms.

Feedback is appreciated.

Depends on your keyboard layout / language settings. You might want to give xkeycaps a try.
http://www.jwz.org/xkeycaps/