Here's a FREE exposure meter app for your Iphone that is pretty good. I've tested it with my Minolta Meter IV and my SLR and it's within a 1/4 stop of both. I think it will make a good meter in a pinch or as your regular meter.

http://itunes.apple.com/us/app/pocke...381698089?mt=8

You will have to use your Iphone camera, but it won't count as digital photography