Welcome aboard Zach! You will be a welcome addition on the Memorabilia side where there is plety of pennant discussion.
Start by looking through one of the most active threads about pennnats:
http://www.net54baseball.com/showthread.php?t=183684
You can also see pennant collections of many members on this thread too:
http://www.net54baseball.com/showthread.php?t=131800
Cheers
-Joe