CCRN flashcards...any suggestions??

Hi everyone!
Just wanted to know if any of you have recently purchased any CCRN review flashcards? I'm sitting for my CCRN in September and think some flashcards would be a great way to get some additional review done without toting a book around!
Thanks for your input!
Gflash pro (iPhone app and probably available for bb or droid) let's you use flashcards you create on your home computer on sites like study stack. Light to carry and easy to access while waiting in line.