Valiant Comics and Planet Studios partnered for a number of years producing a line of very high quality Valiant Comics clothing (my favorite being the Valiant Comics logo baseball hat). As far as I know there is no master list of exactly what was produced. I'm going to attempt to compile such a list (with pictures) here. Bookmark this blog post as it will constantly be updated.
Credit to Sonic Dan's Valiant Webpage for the scan.