Shatner, I do not think a great deal of optimization is possible with non-text content. Old school is it is already penalized in that regard whether or not it is unique (flash sites may have made progress, and it may not necessarily remain that way with html5 canvas, html5 svg, and flash all providing progressive information. But text is still core ... in urls, titles, links and on page. It is the links to flash sites inform Google of the importance and keywords.
Avoid the same text in titles and on pages. URLs be definition are unique - link text uniqueness does not come in to play because most links are the title or company name.
Progressive content using ajax, flash or using images / canvas text are methods to remove content which otherwise would be a repeat. A last ditch effort to avoid a penalty, which if you don't have one may never come. Kind of going to the extreme and not using the English language.
If the demand for uniqueness was as extreme as Hype would lead you to believe then ebay would be a loser.
Top 10 Gainers ... 1) ebay.co.uk = 42.06%
Now if text sites get hit with penalties based on nothing but similar content flash sites may be the last ones standing. But that is not a realistic expectation. People would switch over to bing.com when they don't find what they want.
Panda is a mix of thin content and other factors like heavy advertisements - ebay is thin with no outside ads.
Ehow is a loser who had content reworded (not much different than the rewording that goes on for products on ebay) and lots of ads.
[edited by: SanDiegoFreelance at 10:10 pm (utc) on Apr 22, 2011]