Yesterday I made a Greasemonkey script to detect telephone numbers in hCards and wrap them in callto: links to launch VOIP tools (e.g. Skype). This is the kind of thing I do to satisfy my own curiosity, assuming no one will ever use. Another such project was the Google hCalendar Greasemonkey script I did a while back, except I did that one in exchange for a free book. And it's now being used by Yahoo.

 

i hear that you don't change
how do you expect to keep up with the trends
you won't survive the information age
unless you plan to change the truth to accomodate the brilliance of man

Pedro the Lion, Letter From a Concerned Follower