Has anyone tried Card Star? I tried it and just like the airline boarding pass, the barcodes on the Blackberry can't be read - they even admit it in the FAQ's for Card Star. In addition, I noticed in the BB log files that this app grabs all your email addresses in the background and sends them to dataflurry.com (which is an online marketing website). You may want to change your permissions or firewall settings before using this. Overall though, the app isn't that bad and hopefully they can figure out the issue with reading barcodes from the BB as I know people have had success with the iPhone.
http://www.mycardstar.com/