What apps are optimized for dual ARM processors? Is Android or Meego optimized for dual processors? Is there real-life benchmarks on identical systems except on CPU?

I also would like to have dual-core as must-have feature if my daily usage of N900 consisted packing/extracting of Large OS images and files. Also doing some encoding of audio/video could be boosted with high power cpu. Of course Desktop PC would do all that in 1/1000 of time but still... /sarcasm

What we need is optimized bug free code. Moreover taking advantage of all instruction sets that are already in CPU and GPU. Without doubt horsepower is also needed, but quality of code and moreover memory handling are probably key issues.