Working on two follow-up books to Arcanum:
Advanced Arcanum -- this is a collection of optional rules, thoughts, and ideas for Arcanum. Many of these were things that were designed in the initial update phase of Arcanum, but were outside the scope of that project.
Arcanum Extended Bestiary -- this will be a conversion of all of the monsters in the 5.1 SRD to Arcanum stats. So far, this is a fun and rewarding exercise.
I will keep you posted on the progress of these two books!