With Bush set to promote a constitutional amendment banning gay marriage outright, it's time to monkey-wrench this much misused institution. Since society is set up to reward heterosexual married couples with various tax breaks and other economic inducements, the thing to do is by all means get married.
Single people should waste no time in marrying other single people. Gay men can marry lesbians or straight single women. Lesbians can marry gay or straight men. Once the marriage is legally carried out, you can revert to life as you live it, take advantage of tax breaks and other perks, and effectively enter into civil unions of one sort or another.