Matt Cutts, Google's resident SEO spokesperson and expert addresses a few myths about IP addresses, recurring javascript and the like on one of his first SEO videos.
Here's a great SEO video by Ken Giddens on writing copy for SEO (Search Engine Optimization). He uses thesaurus techniques and others to get top listing for specific keywords.
Like most business people, you'd probably like to only pay for advertising that works - right? That's exactly what google just announced. Check here for details.