Just to throw my  2 cents in regarding finding names, addresses, etc.  I
have participated in the compiling of two additional resources:
 
Systematic Research Collections: Recent & Fossil Mollusca
http://www.inhs.uiuc.edu/cbd/collections/mollusk_links/museumlist.html
 
and
 
Mussel Researchers
http://www.inhs.uiuc.edu/cbd/collections/mollusk_links/uniopeoplelist.html
 
I am in the process of updating both of these lists and would encourage
anyone with additional information to drop me a line.  I am particularly
interested in updating the Museum list and I know I am missing many of the
non-North American Collections.  Please send me any additional information
you have, even if it's just a name and country and I will add it to the
list.
 
Kevin
 
Kevin S. Cummings
Illinois Natural History Survey
607 E. Peabody Drive
Champaign, IL 61820
217/333-1623
[log in to unmask]
http://www.inhs.uiuc.edu/cbd/collections/mollusk.html