A quick update - the Info-Mac archive site at <sumex-aim.stanford.edu> is back up and running, although you should still try to use mirror sites whenever possible.
Type Faster on an iPhone or iPod touch
When typing on an iPhone or iPod touch, to end a sentence quickly and get ready to start the next one, double tap the Space bar. You'll insert a period followed by a space. You can turn this shortcut on or off via the Shortcut slider in Settings > General > Keyboard.