Don't know if you folks want to know this (or care), but the FAA offers web access to the Aircraft Registry Database:
http://162.58.35.241/acdatabase/acmain.htm
You'll need the "N" number from the tail of the plane. You can find out who owns the plane, when it was built and more. The Database covers all US registered aircraft.
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Michael Steinberg
Editor
BizTrip
http://www.biztrip.com