As some of you may be aware Google has proposed a new algorithm called 'Google Caffeine'. It has not yet gone live, but is available for testing out so they gain feedback. You can actually compare your site rankings between the old (current) Google algorithm and what your rankings would look like with the new proposed algorithm, side by side - very interesting!
Google / Google Caffeine Comparison by BlackDog.ie
One of my sites would jump from no.5 to no.3
Another site would jump from no.6 to no.2
My third site would drop from no.6 to no.11
Feel free to share yours as well, I just find it interesting to know what 'could be' (although im not exactly sure in what ways the algorithm differs).