I'm seeing a lot of pages that have (had) decent Page Rank, now show up as PR0. No they are not penalized, otherwise they would not show up in the SERPs.
An example is www. youtube. com
It shows up as PR0 - I think I saw it earlier at a PR8.
1:48 pm on Mar 25, 2007 (gmt 0)
What matters is ranking, not (visible) rank. Check again, you'll probably get a different datacenter with more stable results.
11:45 am on Mar 27, 2007 (gmt 0)
paladin, though I see Youtube having PR8, many pages from my site have gone zero. You would expect a page linked from a couple of PR4 pages and over 2 years old to atleast have some PR greater than zero. I suspect a major PR update is in the offing.