Several times I have wanted to do crossovers between MLP and Exalted, but one of the major stumbling blocks has always been how to represent the MLP races in Exalted terms so they are fair and balenced: So now I turn to this fine board for help and advice.

These are my ideas thus far:

Earth Pony: Bonus to strength, dexterity, stamina, and growing things.

Unicorn: Enlightened Essence Blight, Telekinesis, and ability to learn 1 terrestrial circle sorcery spell or man machine protocol without being exalted.

Pegasus: Wings Abomination, Enhanced Sight Pox, plus the ability to walk on/move clouds, and manifest lightning from clouds, and a one point bonus to a physical Attribute of their Choice. (Physical attributes in this context also include Appearance.)

Sea Pony: Elemental Adaptation; Water, Fish Scales, and Longevity Poxes, Gills affliction, plus the ability to telikenticaly sculpt manifestations of the element of water. (This includes Ice, fresh and salt water, steam, and with sufficient power and effort oils. It specifically does not include blood.)

Crystal Pony: Bonuses to Crafts necessary to have Craft Magitech, and craft is always a favored ability.

Hmm... makes me wish I knew more about Exalted.

Also not sure I'm familiar with the Sea Ponies.  Also you seem to be skipping the Alicorns?  Even if there aren't many of them, it seems they might deserve a slot.

Of note, it seems most of the ponies have the ability to manipulate objects (presumably magically) as if they had hands.  The unicorns, however do seem to be able to manipulate them further away from their body, giving their ability a limited but yet reasonable range.

Well Allicorns aren't something a starting player character character should be. Maybe after they play for a while and spend mucho experience points.