I'm fairly certain that the following were answered by Jim at one point or another:

Do wizards gain power (not just skill) with age (i.e. is a 300 year old wizard more powerful than at 20 years old?) like every other supernatural group seems to?

What did the Red Court use Chichen Itza for when Cortez was there?

What are Harry's specialties in magic (there have been some inconsistencies about what he is skilled at)? How skilled is he with evocation?

How old are the senior council members?