Hi Drew,
Back in March I sent an email to 102 contact references for that mirror network, it would be a good idea IMO to drop another note to these folks, let them know we recognize the traffic they are still carrying, say thanks and keep in touch as the projects looks to, and plans for the next release - 3.4.1 and beyond. Sound like a good idea?
how about to mention their contribution within an official press announcement ? They deserve it.
+1 Kind regards, Joost