Marek Gibney's Literature-Map, part of his online A.I. project Gnooks and Gnod, is a bit like the Visual Thesaurus, only with author names instead of synonyms.
Now, if I'm interpreting this map correctly, readers of my Lynn Viehl novels are more likely to also read Kresley Cole, J.R. Ward, Ginna Gray and Judith Ivory (these being the names closest to mine in the middle) and not as likely to read Julie Garwood, Jim Butcher or Christine Feehan. I don't know how accurate that is, but to keep my ego in check, none of my other pseudonyms made the map.
Also, as my good deed for the day: Online book cataloguing heaven LibraryThing is giving away free ARCs of books to folks interested in reviewing them -- see details, requirements, and the list of currently available ARC titles here.