Have you tried lastpersonalive?Alas, it's gone now. Don't bother to follow the link to the original post. Apparently I'm a prophet.
(Edited to correct bad HTML!) And just in case the entry vanishes, here's the text:
"Involuntary celibacy
Does anyone know of a community on livejournal that helps people who are coping with involuntary celibacy (the state of wanting to have sex/be in a relationship but not being able to)?
I need help with this, and this isn't necessarily the community, but does such a place exist?"