There has not been another PBP survey because PBP is only held once every four years. Don't know if BQ will do another survey or not this year. Regarding Jan and BQ, he/they have a decided retro slant to their reporting. Nothing wrong with that as long as you're aware of it. Lots of great information there.
Machka's site is full of great info and links.
Make sure you check out the UMCA website
http://www.ultracycling.com/
It's more race oriented but still lots of good stuff.