The first link is quite astounding.
Click on http://groups.google.com/group/iphonewebdev/web/iphone-links-tips-and-tidbits
- or copy & paste it into your browser's address bar if that doesn't
work.
each are menus that lead to a bunch of read-only values -- for example
Versions shows you the Firmware version (actually on my iPhone it
shows the "Firware version" for some reason) and the LCD Panel ID.
Looks like its for debugging the cellular network connection.