With today's update, you should be able to use Gravatars on PokemonDeluge. All you need to do is setup an account on Gravatar.com with the associated email and it will work on PokemonDeluge.

If you have linked your PokemonDeluge profile with your Facebook profile, you will now be able to post to facebook what pokemon you need or what pokemon you're trading on PokemonDeluge. In the coming weeks, you'll be able to share more such things on facebook.