[wp-hackers] Image Upload Resizing in WordPress 3.0

[Simon Blackbourn]

There's a plugin called Resize on Upload which allows you to specify a
maximum image width and/or height:
http://wordpress.org/extend/plugins/resize-on-upload

It physically resizes the image to this size on upload (so you don't end up
with the original size image at all), thereby preventing the possibility of
users inserting a gigantic image.

Cheers
Simon