Well while i was looking at some of the keywords for my site i actually saw something great on there that my serp results are getting better.i think google is just testing their new update or ready for another update soon.
It sounds like you think PR updates and SERP's are directly related. This is not the case. They're actually pretty seperate things.
SERPS are what matter. You can have high Pr site and not be listed for good keywords and not make any money.
Yes alot of movement in the index lately when i've been stable for months. Unfortunately most of it is bad.. But i guess when you rank at the top there's only one way your SERP's can go.
SERPS update on a daily basis depending on how many quality backlinks your site has and content. Google doesn't update pr all the time though.
yep I'm in the top ten for several of my main keywords...I am seeing some shifting but it seems pretty normal to me