Please post your impressions of Airpainter. I'm dying to know how well it works. (I don't have an Android phone yet. I'm waiting for the camera update for the Droid.) Also check out Geopaste. As far as I can tell, Airpainter and Geopaste are the closest we can get to iHobo for Android right now. Not to mention Layar 3.0 with 3D animation is coming real soon. But I don't think Layar yet provides for on-the-go persistent shared geotagging from your mobile phone.