To Download please register to see the list of modules that you could use in your project.
Free DNN Module and Free iPhone App for you to use
After installing the module into a page with short page name probably hidden on the menu on your DNN Site which will generate a web service link (please refer below images) the url would be something like http://yoursite.com/desktopmodule/modulename/useronlinews.asmx And Admin can change the page settings to hidden the page from DNN Menu.Page Settings - > Include In Menu? -> Deselect the check box.
Note: Do the following setting in DNN for displaying Users Online. Host > Host Settings > Advanced Settings > Other Settings > To Check the Enable Users Online? Select the check box option to display Users online in iPhone App.
Installing the Iphone App: Install the iPhone App on your iPhone from the App Store. Please note it is totally free. Once installed then you need to click the edit page and enter the Web Service and bookmark your favourite page so next time you can just launch the App and quickly get there.