Believe it or not, my numerous searches on FlyerTalk have not resolved this question.
So, can you or can you not use the Shaver outlet on airplanes (feel free to discuss specific models, if you like... this is FT and I would expect numerous views and abbreviations) or in European hotels/flats/buildings/etc. I feel it is important that there be a definitive thread on this topic, as I think it would help out all FT'ers in the future.
Timothy
That and I'm having difficulty finding a Europlug-to-US adapter in Vienna and I left mine at home.