Our friend Matt Cutts (OK, maybe “friend” is a bit off as he likely wouldn’t know me from Adam) has posted a series of videos on Google Video, answering some of the better questions he gets asked (likely a lot of the questions he most commonly gets asked). In one in particular he answers questions regarding multiple domains (what SEO doesn’t get asked THAT question), launching sites with too many pages and Google images. You’ll find it on Google at Google Webmaster Help on Youtube.
You’ll also find link to a number of his other posts there. Well worth the view.
Another great post by Matt can be found at Matt Cutts Blog – Seo Answers on Google Video. Some great advice and clarification – I especially liked the info on strong vs b and em vs i. Thanks Matt!