I attach some channels logos from Greek TV. They are in jpg format 300x300 (not transparent). Programmer can edit and embed them if he wants in a future edition of ProgDVB. The name of each logo is the same with the broadcast name of the channel. In the main folder are the logos of the channels that broadcast in all over of Greece. The subfolder contains local channels logos (Crete).
By the way, I think that it should be more space in TV window (in channels list) for displaying logos. I have resized them to 40x40, but again are not displayed clearly.
P.S. If I posted in wrong place, please move it.