Hi!
I have created a PCI (PinChangeInterrupt) manager library.
Please visit the project page at:
See the header files for detailed documentation.
Happy interrupting! 
Best regards,
Balazs
Thanks for sharing,
some questions came up:
- do you have performance measurements?
- how much memory does it use?
- how does it compares to - http://arduino.cc/forum/index.php/topic,87195.0.html - (I recently colaborated on this one)?
typo in the example?
Serial.begin(9800); // 9600 is a more standard baud rate 