Hard to see an immediate work use for LibraryThing, but it was fun to look at and easy to use. I 'catalogued' 5 books I'd read recently...and to my delight recommendations for 'related books' that I hadn't even heard of came up...so I can see a great use for LibraryThing in finding new books to read. In fact the more I look at it the more it looks like a wonderful resource for people like me who love to read.
I joined the Librarians who LibraryThing group, and also subscribed to newsfeeds from this group...just for practice...but will probably switch to another group after awhile.
Here is the link to my LibraryThing catalogue.