The Marvel Digital Comics Unlimited digital subscription service, where thousands of comics have been made available for all-you-can-eat consumption, has been arranged in Beta for compatability with iOS, dropping the Flash language version that prevented it before.
But in doing so, they let anyone try it out... for free. As long as you can guess the issue in question. A reader writes;Buggy, but it works. terrible smart panels so not great on the phone. It works offline (I can load a book and read on the plane)So here is, completely legally, for free on any device, Captain Americe #615.1 Or FF #1. Or Power Man And Iron Fist #3. I'm sure you can find some of your own before they fix it...
All in all I'm very happy that they are doing this and I did just read a comic with little problem on my iPhone browser.
Amusingly, login doesn't seem to be necessary if you have the URL if a comic.