Joel - In regards to the comment on pointing everyone to Cloudflare...
I'm guessing that statement means you are using a mix of the
Cloudflare CDN and the original volunteer mirrors still?
No. Cloudflare is currently handling EVERYTHING. Not even our mirrors are in the rotation anymore.
Also, is there a way to force a selection of a particular mirror
(either by CF datacenter or previous mirror), or are all the database
hostnames resolve strictly by GeoIP??
No. The "mirror" is selected based upon which is the fastest from your location.