Oasis in Deserts

Since the desert is pretty plain and boring, just being filled with temples, wells, villages and cacti an oasis implementation in the game would be in my opinion awesome. This could be implemented into an individual biome or a "structure" spawning in the desert every 200 blocks ish with a new tree variant: the "Palm Tree". It can only be grown on wet sand (an additional block in the game that I suggest) and would spawn kind of like an acacia tree, just it being taller and a different shape for the leaves.