I've been thinking of a similar project for project management but wasn't sure if there was a market/interest for it.

In short, a project management app with an MMORPG-ish twist. Completing a task gives you XP (as set by another member of the team, or maybe random) and a chance at items, milestones being similar to quests, etc. You could party with your coworkers/collaborators (multiple people being assigned to one task, for example) or fight each other in an arena (has nothing to do with project management).

I've already started working on it for use at my current job to bring some fun and competition to the boring stuff (making craigslist templates). If anyone here has any interest in it let me know, would love to release it at one point.