In regards to my Citysearch API module, tracking clicks from mobile devices requires that a device id or phone number be included in the javascript arguments. I don't know where to find this information. My mobile phone has been borrowed for the day so I can only emulate on firefox. I've looked through the output of phpinfo() and $requestingDevice->getAllCapabilities(); but can find nothing that looks appropriate. I suspect that the wurfl API contains a function I'm unaware of. My google searches have so far come up empty.