Contact the Patuxent Bird Banding Laboratory:
http://www.pwrc.usgs.gov/bbl/default.htm
What's great is that they'll let the relevant researcher know, and then they'll also send you (thru the mail) a report with info on your particular bird, where it was banded and by whom -- if they know (i.e., if the researcher is known to their database). I've reported several over the years and it's really cool to think that not only are you learning about a particular bird's history but you're helping the scientists in their research.
Good on ya for noticing it and getting a good clear shot of the ID number on the collar!