While this isn't a mapping contest, Journey to the East does have a map prop contest with Steam Bux prizes and in game medals! Just to clarify, this contest isn't in direct association with tf2maps, we just were given the oppurtunity to have it hosted on the domain, sorry for any confusion. You can message me or any of the project leads if you have any questions of concerns!
To submit props to be considered in the Journey to the East contest you can post a link to the download here or make sure your download submission has 'jtte' or 'journey to the east' in the tags.
Check out the full rules, prizes, and deadlines at http://journeyeast.tf2maps.net/
Feel free to post WiPs here for feedback!