I really like this idea, It is really simple and to the point.
It could just play an MP3 on loop or something which tells you what do to. keep timing etc (I dont remember my CPR training). Also display text or something for the steps.
PM me if you want some help making an app like this.
I think if it was free, and a small download size it would definitly be useful - just in case.
Hey to bad we didn't follow up on this might have made some money seeing there's alot of these apps out there now. Do you make apps? Cause I always come up with new ideas but I have no experience with the development of apps. I haven't been on crackberry for awhile i went with the iPhone 4 with Verizon when it first came out. If your still on here hit me up.