You can actually pin the folder to Windows 7 tasbar (and I don't mean that it appears in the jump list).

- First, create a new shortcut (right-click > new > shortcut)
- in the shortcut, you should be keying in the value like this %systemdrive%\explorer.exe /E::{20D04FE0-3AEA-1069-A2D8-08002B30309D} for a shortcut to "My Computer"
- Right-click the shortcut, and choose "Pin to Taskbar".
There ya go - cumbersome, but hey it works. For a list of other codes to different system folders (such as "My Documents"), check this page out. If you want to have a shortcut to a normal folder (not any of 7's preset folders), you can just use this shortcut value :
%systemdrive%\explorer.exe /E "C:\Users\scoopdreams\worlddomination"
That will let me directly access my world domination plans with one-click.
P.S You can also change the icon of the shortcut, and then re-pin to the taskbar with the new icon. Also a tip, you might want to move the shortcut to some out-of-the-way folders, so it doesn't get in the way.