damn ! I'm afraid of google because i created so many Links. Wiki Links , Pyramid strategy Damn ! i feel that i'll get some slap from google i think :\
Yes there is Google PR Update but it is on very limited nos of website. According to me this is minor update affecting only small nos of website
You need not to worry if you use white-hat seo method. Do not do dir submission or bookmarking more than 70 a link in a week.