The iPhone supports the latest HTML 5 database stuff, for local persistent store, as does Android. Blackberry doesn't.
To my knowledge, Jobs has spoken out publicly only against Flash. The arguments he made that it offers a very poor user experience on mobile have been backed up by every objective review I've seen of the Android client. I doubt I'm alone in having decided never to download the thing onto my Android phone. His conclusions — to ban Flash from his platform — betray his control tendencies but the initial observations were valid.
History has also shown Apple to be a beneficial contributor to the web ecosystem, being the driving force behind the vast majority of WebKit development (it was forked from KHTML when that project was four years old, which was nine years ago) and the originator of the canvas element and 2d/3d CSS transforms amongst others. As far as I can think, they've done nothing at any time to hurt the development and propagation web standards.