Siepie introduced me this HL2 mod a few minutes ago, and since it's being released today I thought I'd show it to you guys:

http://www.youtube.com/watch?v=MOh3xYPrYF8

Here are two sites you need to keep an eye on:

http://www.monkeyjunkie.co.uk/NT

http://www.neotokyohq.com/

Apparently their site is getting hammered right now, so it must be quite popular .