Just a heads up, a civil union is nothing like a marriage. There are so many rights and priviliges recognized by a marriage that aren't recognized in a civil union. They are two separate things. A marriage allows for adoption, inclusion in a healthcare plan, and in some cases, a greater sense of security in children in the family.
I've written an essay (or two...or three) on this same topic. The statistics are astounding. I can't remember what sites I used (and I'm too lazy to go find my papers), but some of what I found was just mind numbing. Did you know that Delta Airlines, on a flight landing in Italy, kicked a man not only off the plane, but put him on their no-fly list (meaning that his return airfare was cancelled, I'm not sure he was refunded, and he can't ever fly on their airline again), and had him detained by Rome authorities, simply because he kissed his boyfriend chastely? Or that the Air Transport Association sued the city of San Francisco for allowing gay marriages? Or that the US Olympic committee sued the foundation of the "Gay Olympics" for copyright infringement, but have never done the same to the Special Olympics, the Para-Olympics, or the International Police Olympics? Did you know that (as of 2004) 70% of Americans supported the right for gays, lesbians, bisexuals, and transgenders to serve in the American Armed Forces? Did you know that since the implementation of "Don't Ask, Don't Tell", nearly 10,000 people have been
dishonorably discharged from service? Did you know that a student was kicked out of Baylor University for being gay? Did you know that Alabama, Mississippi, Arizona, South Carolina, and Texas have strict rules in schools that either prohibit the discussion of homosexuality, or limit it to being strictly negative? That the American Red Cross will not accept blood donations from HIV
negative gays/transgenders? Or that a Denny's restaurant forced a lesbian couple to leave because they shared a kiss and sat too close to each other. Did you know that four nations have laws recognizing gay marriage nationally? They are
Canada, the Netherlands, Belgium, and Spain.
If you want some more info, these are the sites I used to write my essay (yes, I caved and went to find it):
http://www.thetaskforce.org/issues
http://www.actwin.com/eatonohio/gay/GAY.htm
http://www.connectforkids.org/node/363?tn=lc/ra
That last one is more about gay rights for teens than gay marriage, but they're pretty much the same thing.
If you need anything else, let me know!