This is a menu button for the gnome panel, inspired by Umbrella Corporation
To install this button
just save the image somewhere
(maybe in your own home directory
then open gconf-editor
app > panel > objects
one of that objects should be the menu-object (you can see that selecting each object and looking the object type)
then select "use_custom_icon"
and insert the absoulte path of the image file in "custom_icon"
Added the blu version