I've got a working model of a SplitButton at CodeProject. You can view the article via this URL:
(new working link:
However, I would need to tidy up the code, and remove some unneccessary bits. The splitbutton would also have image support.
What this control would support:
-The splitbutton style
-Ability to have a ContextMenu assigned to it
-Ability to display images, while keeping fade-effects
Note that this control would come out a little later, once some glitches associated with the control can be fixed.