Most chain restaurant websites have pdf nutrition information or you can print the nutrition page to a pdf. I saved them on my computer but I also emailed to myself and downloaded the email to my iPod Touch. Now the info is stored there in my email and I can even access it without a wifi connection!
Tried it on my iPod touch, but should work on any smart phone. All you have to do is make sure to download the email to the iPod or phone and the pdfs will be in your email for you to view whenever you need them. Great for those times when you are out and not sure where you will be eating.