The question came up the other day – what happens if you have a lot of content types attached to a SharePoint list. Say, for example, a hundred? The ‘New’ menu might get a little, um, large. Well, I used the code for programmatically creating a content type from the other day to create and attach lot of content types.
This is what the new menu looks like normally:
And this is what it looked like after adding 100 content types:
Yup, it changes it’s appearance!
Andy Burns' Blog 
Nice … Were you able to come up with a way to customize this menu item? It would be nice if one could display some sort of a menu within the menu.
Hi,
Nice try. We can also sort the entry in content type, so that it will be easy at least to find the document type under New Menu.