Have you checked out the homepage listed in his profile?
I really hate when people start asking questions about rank, but mine is merely out of curiosity. What is your rank in bjj? What I'm really asking is has your training been continuous and included regular sparring?
Also, I'm very curious; do you train aikido and bjj concurrently? If so, how do you feel about the lack of sparring in aikido, and its impact on the relative effectiveness of these two arts?