As expected, there is no way Google will sit idle and let people moving away to Microsoft’s Bing search engine. For the last several months, a secret large team in Google has already been working on a secret project codenamed Caffeine: a next generation architecture for Google’s web search. Well actually, according to Matt Cutt’s blog post:
Q: Is this Caffeine Update because of Company X or Y is doing Z?
A: Nope. I love competition in search and want lots of it, but this change has been in the works for months. I think the best way for Google to do well in search is to continue what we’ve done for the last decade or so: focus relentlessly on pushing our search quality forward. Nobody cares more about search than Google, and I don’t think we’ll ever stop trying to improve.
So I guess this project has been on before Bing was even born. Anyway, the first step will push mainly on the indexing speed, accuracy, and comprehensiveness of the Google search result algorithm. You’ll probably won’t notice any interface difference but it’s the underlying algorithm that’s been secretly “tweaked” by the team to provide better and more accurate results. According to Google Webmaster Central blog post, web developers and power searchers might notice a few difference and encouraged to give feedback.
I’m not sure what they did, but a few of my posts came on the first result 
Here is an example:
Keywords: “ipod nano chromatic review”
Current (second rank):
Google Caffeine (1st rank!):
Here is another example:
Keywords: “windows 7 sleep”
Current Google (third rank):
Google Caffeine (First, again!):
Again, I’m not sure what they do, but please oh Google, release this quickly 
If you want to start using Google Caffeine, use this Google link: http://www2.sandbox.google.com/
{ 9 comments… read them below or add one }
Great…
Hope the new search engine also gives my page better position than correct position like you
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The results seem to be a bit better with this new search update. Implement it soon google.
very true!! I just tested for few of the keywords related to my posts and I rank much higher most of the time
When I went to the site is was down for maintenance. I’ll have to try later as I’m curious how I will rank for some current keywords, and also some additional ones.
I wonder if this will get those who promote SEO to change their strategy, or provide advice on ranking better with the new changes?
I’m sure it will. It’s unclear what changes have been made though. Google has been keeping secrets unfortunately
hmm this will definitely keep the seo crew a bit busy for a while.
Interesting to see how it impacts link building dynamics and onpage SEO
After test it it seems to be OK. The rank seems to be a litll higher than before. Good job Google:)
I tested caffeine and for some reason I feel like it lags on the more generic searches like “cats.” I definitely think results pop up faster in the old version and they’re very similar pages.
Props to you though! It’s good stuff you have here.
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Thanks, Vickster. Let’s hope Google tweaks it to be better and better