theres really not that many other places, hence all the buzz (here at least) for the 3 sites mentioned above.
but you could also try some of the sites mentioned below as they've been known to have java games on them.
http://www.heavygames.com/addgame.asphttp://www.arcadetown.comhttp://www.2dplay.com/game-sponsorship.htm (accepts java games)
http://www.flashgamesponsorship.com/portalPerspectiveArcadeTown.html (they accept java games but are honest about their pricing)
http://www.ugotgames.com/then of course there the new
Java Store not tried this but looks nice with its
potential 1 billion users
