Actually a page for uploading new post icons would be a complete standalone script. The reason for this is that the Graemlin script is just a script to make it easier to add a graemlin markup and makes heavy use of the markup database and such. While the post icons would only need an image upload and some way to name them, which would probably be saved in the name of the file so that it wouldn't need a database or something just for one bit of information.
I have been thinking of adding this to the markuphack but I haven't really bothered since I don't use the post icons on my own forums. It wouldn't be that hard to do though, but it would be better off as a complete standalone script.
