Just started playing with the 2.3 SVN copy and noticed that the image resizing even for images already on the server works. I was able to go to "parameters" and change the size for large images.  All my images in articles took on the new size :) Awesome.Now if only I could filter items in the admin section by tag.  Maybe a dropdown menu listing all the tags and selecting one shows only items for that tag.  It would make it a whole lot easier to manage.second option would be to type the tag in the search filter box and do the same.