It was User:pdf23ds. Here's the note. Excerpt:
I wish I could have been cryonically preserved. But suicides aren’t treated well enough for that. We get sectioned. I tried asking the cryonics places about options, but they wouldn’t talk to me. Fuck you, Alcor. Fuck you, CI. I might have lived except for you.
Its been a few days. Did you succeed?
Unfortunately, no. I haven't gotten a reply from him in any of those venues, and he deleted the follow-up post and discussion thread :-(