Simple, pimple! [cross-threading to rhyme time, not calling you a pimple!]

Simply type [ url ] before the link and [ /url ] after (sans spaces in the square brackets) and voila! You've got a clickable link.

Course, if'n you got a LONG link, you should use http://www.makeashorterlink.com so that it doesn't make the screen go wide.

Hope that helps!!