Google's latest updated, nicknamed 'Bourbon' is not over. Many people thought the update was completed more than a week ago, but GoogleGuy is now suggesting that the update is only 14% completed and that there may be 2 more weeks of rankings changes until things settle.
Here's the advice that I'd give now: take a break from checking ranks for several more days. Bourbon includes something like 3.5 improvements in search quality, and I believe that only a couple are out so far. The 0.5 will go out in a day or so, and the last major change should roll out over the next week or so. Then there will still be some minor changes after that as well. So my "weather report" along the lines of http://www.ysearchblog.com/archives/000095.html would be a recommendation that rankings may still change somewhat over the next several days.
So who knows what could be next: spam filters, sandbox releases, more algo changes?
Thanks to Threadwatch for the pointer to this quote.