I wanted to have some up-to-date channel icons for my MythTV interface, so I scraped the Freeview website last night. Each icon has had any surrounding white border removed, and they’ve all been composited onto a solid white background. They are also all square, to limit distortion. The sizes vary depending on the original, but most of them are 50 to 80 pixels on a side.
You can get the icons via Subversion:
svn co http://paulbattley.googlecode.com/svn/freeview/trunk/icons