in every menu that contains a script as a item, a small snake is shown ( lastet CVS )
But i think that's a bit ugly, no? No other function has a icon...
I think it is a very nice addition for showing that the function you're about to use is a python script... should help people with deciding where to report bugs... Bugs in python scripts, that are bundled with Blender should be given at http://projects.blender.org/projects/bf-scripts
I think these menu icons are mostly to much and a overdone. It is one of these stupid tries frome M$ to be innovative like Apple in interface design but without real plane and idea. Like always just add something to the stolen ideas to make look a little bit diffrent. So do not add to much of these icons and did just to make a difference between the entries and not for just having the same icon for every entry.