First off I have mentioned my idea to quite a few friends and every one of them agreed that it would be a good addition.
My suggestion for a new mount is "the uni-cycle type wheel from the Steam Valet" found in the Science Center portion of Celestia. It could be acquired as a rare drop from the bosses or a very rare drop from the Steam Valets themselves.
To be honest I'm not all that familiar with computer programming but I think it wouldn't be too hard to implement into the game because the animation is there already.
The very first time I laid eyes on the Steam Valet I thought its wheel would make a great mount. I have finally got the courage to suggest it.