Virtual Earth 3D has been updated to 1.1 (download here). I'm not sure if I'm imagining it, but it seems faster. I don't think the SDK or iSDK has been updated. Note that Microsoft's maps team have produced Virtual Earth MapControl 3.2, Virtual Earth MapControl 4.0, Virtual Earth 3D 1.0 and Virtual Earth 3D 1.1 in two weeks. That's pretty good going!