Yet again, my old work colleague Karen RA3APW in Moscow is putting an excellent signal into the UK on 10m WSPR using a genuine 100mW from his Ultimate 3 beacon. It really is very impressive. Last time we spoke he was using a small 10m antenna in the shack as well! Not sure if the same antenna is being used.
UPDATE 1345z: So far, 11 spots of RA3APW's 100mW beacon on 10m WSPR.