I upgraded this blog to wordpress 2.5, even though its a production site. I am doing this post after the upgrade. You can find lots of new features and better users interface in the admin panel
Some interesting features I noticed
Automatic Plugin Upgrade
Now you do not need to download the new version and upload through ftp and then work according to the author’s upgrade note. You will get a message that a newer version is available as shown in the image below and you have two option, either do it manually as you did before or just click on the link “Upgrade automatically”.
I clicked on the automatic upgrade link which took me the page shown below where I was asked the ftp login details
Once I filled up the ftp information, just in seconds I got the following screen
Just took few seconds to complete the plugin upgrade process. Its really a good feature that has been added.
View Comment awaiting approval
Bugs I just noticed
The author name is coming as DonaldBU. I checked the author name that I could select, there were only 3 names.
- VanAelstynBRENDA
DonaldBU
YDJohn
If I am having the Administrator, status, then my name should be coming as the author as I have logged in as the administrator and doing the post
All the three had contributor role as users.
I will keep updating this posts with the features and bugs, so stay tuned in or subscribe to my blog
Update : I changed my nick name from admin to Kishore and not the author name is coming as Kishore, thats great
Most of the posts on this blog is written by Kishore Asokan who is a part time blogger and WordPress developer. You can find more about him 
If you find any pages with any errors, please post a comment here, I just upgraded to the latest 2.5 version of WordPress. If you need any information, please post a comment here
Some great features that I have tested
1. You can set the thumbnail image size as well as medium one. The thumbnail is cropped to the size you set if you check the option available.
2. You can insert the entire gallery of images to the page with a single click
3. You can preview the post before publishing by clicking on the button provided.
Some plugins are not working
What sort of FTP information is required? I can find no documentation about this and either I’m not even close to entering the correct information or my server is begin restrictive. Thanks for any suggestions.
@dan, you need to enter your ftp username and password and the ftp host details. You should be having this or you can contact your hosting company for this information. Usually you get this information with the account activation email. You can even find it out from the hosting control panel