Long URLs that don't fit on one line often aren't clickable after you e-mail them. They can also be tedious to type out on Web-enabled cellphones. u_n33t squeezes very long URLs like this:

    http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Austin&sll=30.317173,-97.745361&sspn=0.512129,0.883026&ie=UTF8&ll=30.317173,-97.745361&spn=0.512129,0.883026&z=10&iwloc=A

Down to a shortened, compact URL like this:

    http://u.n33t.net/tx59

u_n33t Bookmarklet:  Drag the link u_n33t into your browser toolbar.  Then you can create a u_n33t shortened URL for any page open in your browser window simply by clicking on the bookmarklet.