Frankly I'd like to see gaming keeping the stackexchange branding, which has a lot of kudos and respect. To that end, I'd suggest "GSX" on gsx.stackexchange.com. It's a short, snappy name to refer to the site by, but doesn't throw away all that kudos. And it sounds "gamery" for whatever that's worth. No-one really worries what IGN stands for, do they? People still know it's a game site.