I am new to researching in VA. So if you already know of this site,forgive me.:) I was impressed with their searching abilities and I found many references to slaves and slaves mentioned in wills.
For example, I just noticed a will of Rawleigh CHINN mentioning two slaves, one named Eliza.
Take Care,
Gail
http://www.vahistorical.org/aamcvhs/guide_search.htm