There's an e-mail on its way to the webmaster, but for the ppz who cannot wait, all files you need to play ZDooMGL are right here:
ZDoom 1.22 (Required to play ZDoomGL)
http://www.zdoomgl.tmfweb.nl/zdoomgl/zdoom122.zip
ZDoomGL Binaries (V0.66)
http://www.zdoomgl.tmfweb.nl/zdoomgl/ZDoomGLB066.zip
ZDoomGL Update (V0.66 to V0.66.2)
http://www.zdoomgl.tmfweb.nl/zdoomgl/zdgl0662.zip
The full ZDoomGL MD2 Model pack, including Slayer's v1.3 Models
http://www.zdoomgl.tmfweb.nl/zdoomgl/ZDoomGLMd2.zip
Slayer's latest lights.ini
http://www.zdoomgl.tmfweb.nl/zdoomgl/slyrlights10.zip
ZDLaunch 2.6a (not required)
http://www.zdoomgl.tmfweb.nl/zdoomgl/zdlaunch26a.zip
Grtz.