www.uspapermoney.info/serials is always my first stop for modern notes (although i did just find out he also lists older notes too) otherwise i usually go to my books.
Penny Fanatic, I don't think so,but I'm a new member to CT,you could start your own group if you wanted to,never know it might develop into a good reference group for needed information,consider it ,never know if you don't try it ...right ? It would be quite an undertaking considering the amount of notes,maybe just posting links to mintage sites would be a better idea in a Social Group Forum.