There's been a lot of site-adverting going around (which isn't an issue, considering the circumstances), but I don't feel that it's entirely necessary to be sending HIH off with multiple 'go here!' posts in every thread.
I'll try to get everything listed here, but if I miss something, let me know.
- The obvious choice after HIH; as well as where HIH will be hosted, once frozen.
- The Waypoint forums. Inhabited by a toned down and 'nice' version of the Bnet forums, as well as various members of 343i. Not a bad place at all. (If you get an error when visiting, it's a cookie issue. Go to Xbox.com and sign in (or visit, if you're auto-signed in), then revisit the forum.
- A site/forum for Jumping, Gaming, or anything else you want to talk about, run by several HIH staff members.
iTrick Bnet Group
- Dunno how this will work out, but it's there.
- There's also an r/highimpacthalo, but I've only received a reply from the mod of r/hih
- Simple site for tricks and glitches (and anything else). Undergoing a bit of a technical reworking at the moment.
- Should know enough about this site by now. If you don't, the url is pretty descriptive.
- Not sure how to describe this one. Seems to be a different take on forum-growth.
- Hopefully you're already aware of this.