Microsoft is trying to kill public folders and make everyone go to SharePoint. As far as mobile access to SharePoint went, it was rather bad. Text only or a really small screen of the SharePoint page. Today I needed a way to make SharePoint pretty on an iPhone. Basically more elegant than the text only version. After some research, I found Moshare. http://moprise.com/
Right now the program is free to download and use via the App Store. I downloaded, installed and configured in under 10 minutes.
The drawback I see is that all information is read only. Which, let us be honest, if you are using your iPhone to access the site, do you really want to do more than read the info?