This is one of those natural alliances that make you nod your head at the "right-ness" of the connection. Too often, I read about companies announcing "strategic alliances" that are neither terribly strategic nor actually an alliance in the sense of a meeting of equals generating a sum that is greater than it's parts. iotum's Talk-Now is the kind of application service I wish was available for my Treo 700p or Nokia N93. Sadly, it remains an exclusive tool for Blackberry users (at least for now).
Talk-Now, which I first saw at CES in a hallway demo (and I do mean hallway - see the accompanying photo of founder Alec Saunders' demo kit arrayed on the floor of one of the Las Vegas Convention Center's hallways). It's a terrific start to unraveling the presence puzzle – leveraging mobile devices' ability to display both time and location information. In essence, Talk-Now lets you inform people on your buddy list when you're available for a call and when you're not. And Talk-Now lets you know when someone you need to call makes themselves available.
Add Jajah to the mix and you have the ability to make those calls at extremely low per-minute prices when you know the other party is available to talk.
Like I said... natural.