Much ballyhooed when Sue handed it over to "the feds" -- as they are known in my line of library business -- in '93 or so. I just wonder is any of the many writers and researchers who post frequently here have ever actually been through the collection, know how accessible it really is, what the terms of Sue's bequest were (copyright?), and whether LC ever plans to include any of the material in their American Memory project?
BTW, a finding aid for the collection is available online here (I'll spare you the EAD tutorial):
http://lcweb2.loc.gov/service/music/eadxml.../mu004009_x.pdf
The recordings originally included in the collection appear to have been "transferred to Motion Picture, Broadcasting and Recorded Sound Division", but, sadly, I can locate no registry or inventory for them. Darn it.