I was recently checking out the IdeaJam website and really liked the work that Bruce and Matt having been doing there. Matts use of xPages has resulted in a very functional yet modern looking web application that just happens to be built on Domino.
Matt has recently been working with the Hursley team on the xPages workshop - so he knows a thing or two about the subject.
I noticed that there was a url to access IdeaJam via the iPhone. Take the time to have a look as it's a lovely piece of work. Bruce informed me that this was based on work by Jeff Gilfelt - with instructions on how to do it here.
This should make it easy to give iPhone users access to Domino data - at least to view it, however it also shows up really well as a widget in the notes 8.5 sidebar, (which is nice).