Yeah, some have been implemented in the latest beta, like the Summoner, File Gel/Zol, Bombchu, some Shooters, a magic Pols Voice, and a Fire Octorok/Bomb Octorok. I don't remember which ones were actually part of the contest. I believe an Ice Wizzrobe is also being worked on.

EDIT: [Here] is the contest for anyone who cares...