Yup. Suicide, although sinful, is generally a right.
I thought I recall you attributing the source of natural rights to God...:)
But anyways, we hold in abeyance the rights of children to vote, drink etc. b/c they're not rationally fit to do so, and likewise with criminals and the insane. I guess the point boils down to, can someone who wishes to kill themselves be thought rationally competent to decide such a thing? Of course, this brings up the interesting point of dying for one's country, which I would also be interested in hearing your thoughts about, given that we are only obligated to save someone if it places us in no danger--or are there special wartime clauses in individualism?