Script Summary: Alt+clicking and dragging across a text fragment will trigger Ahoy and furnish you with an Ahoy link to your selection.
How to use Links Ahoy!
(1.) Press the Alt key on your keyboard and hold it down
(2.) Click and drag your mouse across some text in a web page
(3.) Release the Alt key and mouse button
Here's an Links Ahoy! link to the text "a regular web page" in the print version of the "Avoid Common Pitfalls in Greasemonkey" article at oreillynet:
You can see that the linked text has been highlighted in grey.
Want to see it in action?
Install the user script and then click HERE