I've set up a SIAI account on LibraryThing, for a bunch of reasons even though I've not heard back from MBlume.

http://www.librarything.com/catalog/siai

The heuristic "it's easier to seek forgiveness than permission" seemed to apply, the upvotes on the comments below indicate interest, I wanted to separate my stuff from SIAI's but still have a Web 2.0-ish way to handle it, and information wants to be free.

If this was a mistake on my part, it's easily corrected.