If you've listened to any of Leo LaPorte's podcasts over the past few months, you've probably heard an ad for the Squarespace content management service on one of those podcasts. I'm apparently so impressionable of these podcast ads that I suggested it be evaluated by a couple of people even though I've never used the service myself :-)
One of my caveats when I mentioned it was that it did not have a mobile management or content creation component like, for example, WordPress and its WordPress for iPhone app...