BGP Security Research Question

[Anthony Weems <amlweems () gmail com>]

I'm a student in college learning about networking and, specifically, BGP.
Does anyone have any statistics on the use of S-BGP or soBGP in the wild?
I've read a few papers / RFCs on the subject (from Cisco and the like), but
I haven't been able to find any information about actual usage.

Additionally, do people scan BGP speakers in the same sense that
researchers perform scans of the Internet (e.g. zmap)?

--
Anthony Weems