Here you are:
http://rapidshare.de/files/47645837/IR-Tracking.zip.html
That's the old version. There were some versions I created after that, but my camera is broken and I can't really check what I did there. You can dig through it and look if it's useful to you:
http://rapidshare.de/files/47645855/Processing.zip.html
The old release only contained blob recognition, what I did then was add Blob Identification, so if you move more than one blob around, the program tries to keep track of which one goes where.
If you have any questions (regarding weird comments or stuff), feel free to ask me and I'll look into the sources.