This should not be very hard to implement with the current map compiler? only a diffrent lightmap algorithm?

Such feature would be nice.

I don't think that static AO looks any good, with the low lightmap resolution. We can give it a try. Do you know a software that uses AO for static lightmaps?

Cry Engine 3, and I am not sure "Killzone2" use it?

Cry Engine 3 does not use AO for static lightmaps. It has an AO shader.

Killzone 2 had it turned off in the release version, was a shader as well, which, even after being tweaked the hell out of it, turned out to be too slow.

The faked AO was just clever lightmapping done with the Turtle engine. (they made a new render engine now, Beast, used in Unity3.0)

http://www.illuminatelabs.com/

Then i am sry, give me the donkey head

I think the low lightmap res would only be a problem for low range AO which in fact could be additionally simulated in real time by SSAO besides a static wide range solution.