Andrew - I can confirm that SkyMap.Org is pretty good and has been there for a a while. As you say, GoogleSky (or SkyMap) doesn't give professional astronomers what they want. However the idea of a planetarium-style entry point to VO databases is an appealing idea. Interesting, the guy who wrote Stellarium now works for ESO, and they are developing the idea of a Stellarium-style front-end to the ESO archive. Paolo Padovani talked about it at JENAM this morning.