It appears that both the PR and BL updates are starting together. On this blog - it was promised that old PR penalties would be removed on this update. mattcutts.com/blog/google-pagerank-update/ He is not saying what kinds of penalties they are????? Is anyone seeing any BL from directory link pages? There has been some shifts in rankings over the past week as the algos change
the backlinks are generally updated weeks before the pr updates and the only links I check are in webmaster tools, they always seem to be changing