I put other because I could not select them all. I spend a lot of time here, I get questions answered and gather LOTS of information on homeschool curriculum and methods. I also have some fun when the interesting threads come up.
We attend a co-op. The families all share the same Christian values as we do, but not necessarily the academic goals. They are friendly and a lot of fun. We have mom's night outs and a room for moms (and a couple of dads) to hang out, eat, and talk in during our kids classes. There are many very experienced HSers that I can talk to there. Plus, it's just fun to be around people IRL.
I also have a community group - small group at church. Two of the other families (out of 5 total) homeschool. We use some similar materials and our oldest kids are all 6 and in first grade. We have only been a group for 8 weeks, but so far we are really liking the fellowship and it is nice to have friends in the same place we are - both in family and education.