There is a thread like this over in the Black Mesa forums. I started off by saving some of the pics of the folks, and now it has turned into a mega gallary like you would not believe.
I wont be doing it here, but I highly recomend that someone that has the time and inclination to save the pics as they are posted. Cuz over months, images go broken and such, and it is really great to see the whole compilation.
Oh.. and this is me.