SharePoint Dragons

Not only can you change the name of a list title, using SharePoint Designer you can also change the URL itself:

1: You must be a site collection admin.

2: Open the site in SharePoint Designer 2010

3: Locate “All Files” at the bottom of the left hand navigation pane, which will open the main “All Files” pane on the right.
** “All Files” is not visible if your do not have the appropriate permissions.**

4: click (once) on “Lists” in the main “All Files” pane.

5: Right Click on the list that you want to change the URL/Web Address for and choose “Rename”

Taken from: http://social.technet.microsoft.com/Forums/en-US/sharepoint2010general/thread/03d0aba0-9533-4237-8459-2f3a8e2a03e0