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.
The cached copy is no longer available. And the WayBackMachine cannot display the site due to robots.txt, unfortunately.
This post was from awhile ago and I don't think anyone with access to the note is still around to supply it. You could try asking everyone here for a copy and see if anything comes of it.