Yeah, you heard that right. Opera has stated that they are working on an iPhone version of their browser to be released alongside the iPhone SDK - whenever it comes out. Why? It is hard to speculate - the Safari browser really makes the iPhone/iPod amazing. Opera is persistant though. They want their browser to run on every single device that exists in the universe - from toasters to spaceships, Opera wants to work on everything.
Realistically, though, they aren't going to have much of a chance against Safari on the platform. Opera is a solid browser and brings some awesome features to the fold (built in torrent downloading for instance) but the mobile Safari, with its panning and zooming features will be hard to beat.