its a shame to say but i do think he's past his best now but i dont know why moyes doesnt use him as an impact player for the last 10-15mins of a game.
i have no link but i was on facebook and theres a page called Follow Everton, they have put a status saying 'From what we're hearing, it looks like Donovan could be coming back in January.'
I just hope that he can find that form he was in for Holland U21's and Feynoord. Maybe the Spanish League didn't work out with his style of play, the Premiership might be up to speed with this lad.