There is real shit going on at google lately. My main money site fluctuates between position 1 on page 1 and position 5 over a few weeks but this week it has moved at least a couple of times a day! Today it has been at number 1, 3 and 4.
I really feel like I don't know anything anymore.
FYI, PR 3, 5 year old site and has 817 pages indexed.
I, like most experienced marketers, am just waiting it out to see what this is all about because it is more than the google dance but I'm not going to press the panic button yet as my site is original, has loads of fresh, content and does everything manually,including 3-10 social bookmarks a week.