It's raining gay news! Or something...
Lucent Heart is an anime MMORPG ported over from Japan that seems to pride itself on two features. First, you create a character whose birthday determines your Zodiac sign, which then determines your stats, and seems to play into your abilities. Furthermore, it allows you to use a Cupid System to match up with a gamer and be in a relationship. You gain various boons in the form of buffs and enhancements if you quest and play together as a couple. Doing so can also result in in-game marriage (with the option for later divorce). As yet, the game only offers this in heterosexual pairings.
As of right now, it is still in a closed beta.
Gamania is holding a poll for the game's next update to see which features are implemented. It is using Facebook's new poll feature to determine among four choices: same-sex relationship/marriage in the Cupid System, smoother WASD, more emotes, and a timezone option for the Cupid System. The poll is right here, and does require you allow the Poll application access to your Facebook account.
Furthermore, Lucent Heart is donating $5 to Japan relief efforts for each fan who likes their Facebook page.
If you have any interest in keeping up with Lucent Heart, which looks charming in and of itself (and is free, so I may well check it out), their official page keeps up to date on its progress.