we recorded a video at the CeBIT with Shola and Daniel on IE8 for Devs or - say - techies. It's partly in English and partly in German.
You can find it here https://channel9.msdn.com/tags/CeBIT08
I downloaded IE8 beta yesterday. I had it the week before on a separated machine just to try but now I installed it on my daily box. So far it seems to be stable and performs quite well (personally I would say - not measured but according to my feeling 😉 it is even faster than IE7).