PPK claims that by designing only for the iPhone, we’re setting up for another IE6-like event.

This article counters that:

When Koch damns developers for professional hypocrisy and incompetence, I see a quiet revolution of mobile developers waiting for other phones to catch up to the iPhone.

It’s still early on for the mobile web, and I think that gives us reason to push things a bit more than would be appropriate in a Y2K, IE6 world. If developers don’t accept the limitations of conventional mobile browsers right now, mobile manufacturers may well start moving things forward.

If we can get close to parity or unanimity in the mobile browser space, we’ve succeeded, and then need to start getting back to traditional principles of progressful degrahancement and the like.