Well, the point about the iPhone's browser needing to be restarted isn't entirely accurate. If you have been browsing using the iPhone (yes, on only the kinds of pages the browser is capable of rendering) and switch to the music player because you want to change playlists or something, you need to go back to the home screen to relaunch the browser. That's true. Yet, the page(s) you were looking at is(are) still there. Select one and pick up where you left off. This seems analogous to returning to the task switcher and selecting one or other open browser page on the N900.