Once with Alexa’s new ranking system announcement, a lot of blogs have lost their rank. The reason is that Alexa is now based on more informations, not only the surfers that have Alexa toolbar installed. Now websites and blogs that had a tech savvy audience have lost rank, Alexa becoming more accurate and not advantaging them anymore.
A lot of popular websites and blogs have met a drastically decrease in rankings, like Problogger ( 3xxx -> 12xxx ), Digitalpoint ( 3xx -> 9xx ), Shoemoney ( 2xxx -> 19xxx ). I have also seen some not-so-major changes in my websites rankings, most of them going down a bit.
I see this changes as an improvement and hopefully Alexa will continue to become more and more accurate, because a lot of people and mostly advertisers are basing on this stats that, at least until now, weren’t relevant at all.
Find more rank changes on some blogs at Amit’s blog or you can read Alexa’s announcement.

April 21st, 2008 at 9:35 am
Hope the new changes in the algorithm can make Alexa more reliable and accurate. From what I had the chance to notice, it seems all my blogs have gained better rankings. Interesting to see how it will shape up in the following weeks and months.
April 21st, 2008 at 11:23 am
This is a pain. I think most people and bloggers would agree with me. You really have to be on the ball to keep up with the changes
April 21st, 2008 at 3:39 pm
Thanks for the information. This answers a few question I had about Alexa.
April 27th, 2008 at 9:33 pm
Hi! I have been working with different SEO services, called søkemotoroptimalisering in Norway for about 10-years by now and I am also a Google Certified Advertising professional and think that Alexa really needs something like this to improve their quality. I wish Alexa good luck!
Best regards,
Trond
April 27th, 2008 at 9:37 pm
By the way - I have heard some rumors that Google is supposed to be working on some new actions to improve the PageRank system a bit more. I don’t know the details in this, but I guess there will be something posted in your blog when this is active?
Rgds,
Trond