I uploaded one of mine on the previous thread yesterday, its the I like Free Stuff one on the third page. I have no school for a day or two and I am very bored. I wouldn't mind spending a couple hours developing some coldboot logos. When and if the Mods get a separate thread for coldboots I will happily post them up.
If we had hundreds of people replying to these news threads then I could see the need to make separate ones for only attachments, but as it is users can reply to the corresponding news thread with their creations directly... and most only have a handful of replies anyway.
We will keep separate threads in mind if things change, but chances are in a week or so people will already move on to other developments.