The Princeton University Library has recently acquired a set of rare coins collected by the late Souheng Wu. The coins will be integrated into the Rare Books and Special Collections' Numismatics Collection. (I am just excited to learn a new word today.)
The information and images will be made available in the university's digital database in the above link. The collection is quite impressive, judging from its description in the article. Though it seems they are a bit slow in cataloging them (never mind the lack of pictures). I would be interested in seeing the Kitan and Jurchen issues.