For those of us that were unable to attend PubCon 2008 in Vegas, Google has released a video by Matt Cutts which recreates the “State of the Index” talk he did there.
This is a summary of what Google did in 2008 and what they intend to do in 2009.
It’s a long video, but worth the watch! There’s a slide version if you just want to skim through this.
Enjoy 
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What’s EarnthruGDI?
earn through “graphics device interface” maybe? How far into the video is that?