channel icon scraper?

right now it's possible to stream video from mythtv and tuxbox, and it can be added to the videos as a source, but, as far as i know, there is no way to make xbmc look for channel icons anywhere on the net
could it be possible to add a new 'source type' for live tv and scrape icons somewhere?
i think it's already doable in the pvr branch, but could that be imported in linuxport without much trouble?
thanks