The first competition was the Cycling event. The rules: Build a biker outfit to compliment the Chopper. It must be either Leather or Mail.
Results of this competition can be seen on Tome of the Ancients' blog here: Mogolympics Results Round One - Cycling. There were some great outfits that people put together, and quite a few of them! I don't envy the judges one bit.
So without further adieu, this was my entry:
Items used in this Transmog & Source:
Bonefingers - Amnennar the Coldbringer, Razonfen Downs
Bandit Cinch - level 20ish dungeon trash/rare spawn drop
Bandit Boots - level 20ish dungeon trash/rare spawn drop
See this transmog on other race models: WoWhead item comparison of this set