Just a quick note: VikS of the neoqb team has posted on the SimHQ forum about multi-core processor support:
He also mentions the computer specs used to make the relatively smooth promo videos:
As an aside, click on that link to the promo videos and you can now see all the videos in their original quality with the help of the DivX web player. These were the videos I previously uploaded to Stage6 before it shut down.