Here he is (ad in Paintball Games International magazine):
Proto 06 is advertised in issue 199 of PGI, along with pix of the new proto goggles.
Features are:
Clamping feedneck
two piece barrel
new lower pressure bolt kit
on/off bottom line
1/2 " off the height than proto 05
4oz lighter than proto 05
new milling
retains the trigger from last year
more info on the US proto site: http://www.protopaintball.com