(DISCLAIMER: Read before opening the link above.
The above site is highly addictive. Make sure you have sufficient time to browse because if you start reading the entries, you won't be able to stop for quite some time. )
Not only are these autocorrections hilarious, but they are a phenomenal source for observing computer-mediated discourse in action.
This one below, for instance, is a great example of using ALL CAPS strategically to give emphasis, but NOT shouting.
This one here is a great basis to start talking about word formation processes and morphology.
LOL is an acronym, formed from the initial letters of "laughing out loud", but this example shows its status as a new word of the English lexicon. The use of the inflectional morpheme ( -ed) could be an indicator of its new status.
And finally, a funny one with lots of exclamation marks. Enjoy.