"What is fast writes? "
The Intel specification for AGP:
http://developer.intel.com/technology/agp/agp_index.htm
Don't bother reading it, it causes migraines. Fast Write allows the AGP to do block transfers of data without passing it through main memory. This doesn't make much ssnse since main memory is where the CPU puts the info that the video card GPU works on. On the other hand that explaisn why Fast Writes produces no measurable FPS increase...
"Is omega drivers better than Ati's one's and why? "
Absolutely not. I tested several versions with multiple benchmarks and in game play. The image quality was inferior and the benchmakrs were identical. All Omega does is change some internal settings on the Identical ATI driver. Omega contains no new (i.e. better) code.