You need to access your iTunes account in order to reinstall this application. The following link will provide you with the steps to follow.
Having the same issue. Reinstalling the current version of slingplayer is not a problem. I'd like to install a version of slingplayer that is compatable with my iphone 2G. The latest version on Itunes won't install in my older iphone running firmware 3.1.3.
Any idea how to get a version of slingplayer that is compatable with this iphone firmware?