Not sure how many are aware, but Miiverse is a game-specific messaging system on Wii U (and soon 3DS apparently) where you can post messages and pictures on communities designed for all available games. This system has also proven effective for giving customers a way to tell publishers what content they want, as Earthbound was released to the American Virtual Console and Mighty Switch Force 2 is getting a Wii U port all because of fans making their voices heard.
I realize not many own a Wii U at this time, but I would suggest that all who do join me in raising some awareness on it for our little Dream Traveler. I'd suggest posting to the Tekken community, as it's the most populated of the communities for Namco's games and hence the most likely to be viewed by Namco themselves. If/when the 3DS version of the service launches the same can be done there as well.
I'm not suggesting this as an alternative to the petition or anything else, rather as something that can be done in-addition to them. I also completely understand that many will have to either wait before they can take part in this or just won't be able to, but if doing this can help the series in any way then I think it's worth trying.