iPhoto export plugin iPhotoToGoogleEarth is up to version 1.02, adding altitude data (in case you’re flying) and, yes, timestamps. If the time was in the EXIF data, it’ll now be in Google Earth — couldn’t be easier.
The Earth is Squarelists what’s new in the soon-to-be-released NASA World Wind 1.4 beta. Impressively quickly, it sounds like KML Importer will gain timestamp support, while WMS support gets an upgrade. NWW also seems to be working on making itself prettier, with animated 3D clouds, 3D lighting and atmospheric scattering effects promised.
Roo Reynolds over at Eightbarmakes progress on a SketchUp => Second Life converter.