Over CES, online music service provider Slacker announced their application for BlackBerry, first spotted at CTIA and highlighted during the BBDC keynote in the fall. I had tried out nuTsie, and although it was completely wireless, there were some reliability issues. I wonder if sideloading through Slacker would be any better… Time to give it a shot, eh? Head over to www.slacker.com on your BlackBerry browser to get started. iPhone compatability is on the way (as early as tomorrow), so keep an eye on these guys.