So most of black mesa came out today: http://release.blackmesasource.com/
If you dont know what this is its a mod for source of a remake of half life one for free. Really worth a play.
ive been playing it, its got lots more dialogue from npcs then the original that's for sure
I wondered how long it would take for this topic to be made :P
One of my best friends has been obsessed with this for quite some time and I remember him assuring us that it would definitely be out by the end of 2009... and then promising it would be by the end of 2010... and then betting me $20 it would be out by then end of 2011.
And after all that, it is finally out (most of it).
I am actually quite impressed by it, I think they have done a really good job.