So this one is only sort interesting.
In the RTM (shipping) version of Windows 7, each product edition will provide a different set of icon presets in the Start Menu. You may recall that the default icon set in the pre-release versions (of Ultimate) have been pretty static for a while, and includes Getting Started, Windows Media Center, Calculator, Sticky Notes, Snipping Tool, Paint, Remote Desktop Connection, Magnifier, and Solitaire. Apparently, this is changing.
Here's the list of default Start Menu icons for each product edition:
Windows 7 Home Basic
Getting Started, Windows Anytime Upgrade, WordPad
Windows 7 Starter
Getting Started, Windows Anytime Upgrade, WordPad
Windows 7 Home Premium
Getting Started, Windows Media Center, Calculator, Sticky Notes, Snipping Tool
Windows 7 Professional
Getting Started, Connect to a Projector*, Calculator, Sticky Notes, Snipping Tool
Windows 7 Enterprise
Getting Started, Connect to a Projector*, Remote Desktop Connection, Sticky Notes, Snipping Tool
Windows 7 Ultimate
Getting Started, Windows Media Center, Calculator, Sticky Notes, Snipping Tool
* Connect to a Projector will only appear on mobile computers. On a desktop PC, there will be one fewer default icon in the Start Menu.
Also, PC makers are allowed to add up to five custom icons to the default Start Menu.