I'm here, and still moderating this Google Group, though there hasn't been any activity except this query in a long time.
I've focused on a couple of other games -- for research, not entertainment -- since my retirement. I've published a solver for Chomp, and a Note about it in ICGA Journal. I'm currently working on Qubic, which is a lot harder, because I'm not sure I'll live long enough for serious progress on Hex.
I would love to tackle 10x10 hex, however, and maybe with the experience in Qubic, I'll take it up again.
Meanwhile, when I've tried to find online hex, I find games but no opponents. I haven't tried all that hard, though.