Well the thing I found was flaky (you can try it yourself, install an app on your phone called ForumKast). Yeah it uses the iPhone interface rather than just displaying a hard to navigate web page in your phones' browser. It's free and nothing needs to be done to the server to make it work, but it doesn't have a very good layout/organisation of the forums.
There are others, the next on my list requires some work on the server before it will work and then it costs to install it to your phone.
I now understand why you'd want a specialised app for this. You have it for FaceBook, you have it for GMail, why not have it for your other 'primary' sites eh?
The options I have looked at are just generic phone apps for accessing SMF forums.
As for having an app specifically tailored to BW, sure, this is possible, as would having an app that helps with EASY etc, but this would take some actual programming. This usually means iPhone developers and money...
Let's see how we get on with the next on my list of SMF phone apps
Tom...
p.s. it will be my turn for a smartphone in Dec. WOOO can't wait. I may get the HTC Desire.