Google has once again updated its indexed causing many websites to flucuate in rankings, backlinks and pagerank score. Googles Matt Cutts has good information on his blog about this latest Google update.
I dont see that much change in my sites. I see some movement in page rank and link totals but not much else, so far. Usually you dont have to worry about your site just disapearing, as long as you have a good site that follows the Google guidelines.