I deleted most of this list because StanieI put in all the work to get every single llama group into one list. It's even organized into sections for joinable and un-joinable groups. I couldn't possibly take credit for that.
It's extremely unlikely that anyone made a llama account and converted it to a group between April 1st, 2010 and July 4th, 2010. But it is completely possible. If you do ever find such a comment I'd love to see it.
You're very welcome! I went through all 650 search results for "llama" in the groups section of the site. I'm only sharing the groups worth commenting on. The groups that can be joined I am a member of, which can be seen on my profile. There's a lot of worth ignoring dead groups lying around. I hope I can help a lot of people.