Yup, on January 29th, on Demon Soul, I leveled my stand-alone guild. The release date of Cataclysm was December 7th, so after a month and a half, I had accumulated the 16.6 million of guild xp needed to advance to level 2. That's not easy, btw. Here's a link to Wowwiki's guild advancement tracker.
Unless you're a level 85, it feels like any quest you do is a drop in the bucket. My 2 level 85's (Bloodshrike and Pallormortis) get 17,350 guild xp for each of the daily fishing and cooking quests in Orgrimmar and Dalaran, so logging on to them for about 15 minutes to do the quests is usually one of my first concerns.
Granted, I don't spend too long on each character, and since a few of them had recently gotten to 80 before Cataclysm, they were still working on their Crusader titles from the Argent Tournament, which, no matter how high of a level you are, only reward about 5k guild rep.
I am considering outsourcing, though. Basically, advertising in trade "Looking to hire leveling mercenaries, 500 gold per 1 million guild xp, repairs fully covered by the guild." That way, they get to do whatever they like, be it PvP, heroics, or just questing, and as long as it gets guild xp, I'm happy.
