“Optimized new content that isn’t stuffed with keywords will help, especially if done consistently”

It’s something I always have to tell clients. If you write content well and often you don’t need to worry about filling it with keywords. It will happen organically if you just talk about your topic thoroughly enough.

I will however make note that your #4 isn’t entirely accurate. Flash can work with some text as long as it’s a specific manner. On top of that Bing is stating that they can crawl, read, and index flash as if it were a regular page. This is according to their “Guide for Webmasters” PDF they published at the beginning of the month. I have been unable to figure out how they are able to do this.