i'm glad to see there are other Latinists on advogato. i'm a little rusty, but perhaps i'll get up the nerve one of these days and post a diary entry in latin.
the updated latin lexicon mentioned by schön is:
Egger, Carolus. Lexicon Recentis Latinitatis. Civitas Vaticana: Libraria Editoria Vaticana. ISBN 88-209-2239-8.
it is an Italian -> Neolatin lexicon. perhaps not surprisingly, i can't seem to find anyone selling it online. it may be out of print, although i doubt that since Vol I was published in 1992, and Vol II in 1997.
hmm... the UC Berkeley library seems to have both volumes, so perhaps i'll have my brother check it out for me to peruse.