After reviewing DigitalPoint Forums, I saw about 5 different threads discussing a PageRank update at Google. I am honestly not sure if this is a legit update but it doesn't really matter.
A toolbar PageRank update has no immediate or direct impact on your rankings at Google.com.
Having said that, there are a few threads at the forum on the update but this DigitalPoint Forums thread is the most active at the moment.
Forum discussion at DigitalPoint Forums.

Comments:
Markus
02/26/2008 03:58 pm
I can see an update at some datacenter.
Anthony
02/26/2008 11:36 pm
I noticed some PR changes on a few sites today, so I did a search to see if anyone else was noticing and found this blog post.
Marian
02/27/2008 08:57 am
I check all my web sites and i don't see any update?!
dhurowitz
02/27/2008 09:52 am
we noticed changes in both PR, backlinks as well as some of our clients rankings.
No Name
02/27/2008 12:33 pm
Can't see any updates at the moment, thought it wasn't going to happen for at least another month.
Titus Raj
02/27/2008 03:47 pm
I had an update. My site went up to PR5 for about 3 hours and then slid back to PR4. Talk about a short lived joy. This was the ultimate after trying to get it back to PR5 for a year and a half after it dropped to PR4
Tony
02/27/2008 05:33 pm
I have a client site jumping all round the 1st page of Google over the past couple of days - Positions 4, 8, 10 then 4 again!?
Linda Tong
02/28/2008 07:37 pm
I have seen a PR change on one of my websites. But as far as the rest. No changes so far. Not even in any DC's.
Jolanda
02/28/2008 10:15 pm
My site went to a PR 3 ...my other site did not change but I am happy with this =)
Lazaros
02/29/2008 05:46 am
My website that is online 2months now with one simple page html is get to 2 pr the website gonna be online 1st of april
sem4u
03/03/2008 12:05 pm
I am seeing changes for sites that I monitor - some are losing a point or two, but are all keeping their rankings at the moment.
sem4u
03/03/2008 12:07 pm
As usual my PR0 site is doing the best... :)
Question
03/04/2008 03:09 am
"A toolbar PageRank update has no immediate or direct impact on your rankings at Google.com" Does this statement imply that there is a delayed or indirect impact of pagerank on rankings at Google.com? Please elaborate on what you mean by this as I was under the impression pagerank did factor into where a page will end up in search engine results.
Robert
03/06/2008 01:36 pm
I have yet to see any connection between those green pixels (although I just have a text number in FF) and rankings. I'm so over the PR craze already!
Jason
06/07/2008 05:00 pm
One of my website went from 0 to 3 while others have no changes, although they are hosted on the same server.
No Name
07/14/2008 10:07 pm
Remember there are a lot of factors aside from PR value in SERP's. Content, backlinks, anchor text, etc. all play more significant roles IMHO.