iStik, Inc. has announced that it is now accepting pre-orders for its iStik case for the iPod nano (with video). Designed as an alternative to athletic armbands, the iStik is a hard clear case that utilizes magnets to secure its back to an included separate panel, allowing the user to stick the nano directly onto his/her clothing or bag. The company claims the magnets are safe for use with the nano, but cautions against use with a pacemaker or…