Guys, Lorax didn't say that he was considering it. He simply asked a question. (EDIT, I said this before I read OneLight's post)
Backontrack, in the first place, if you're going to quote scripture, do it right. Exodus 20:13 says, "You shall not murder." It doesn't say kill, but that isn't relevant to suicide. I just wanted to point that out.
Suicide is like any other sin that you may commit before you go to heaven without asking for forgiveness. Consider this: If you lie to your friend and don't ask God for forgiveness while you're driving away, and you get killed in an accident on the way home, is God going to let you into heaven? Of course He is! This is the same concept, as you have committed a sin and haven't asked for forgiveness.
1 John 1:9 - "If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness."
He will forgive you of ALL unrighteousness; not just of telling a white lie, but also of committing adultery.
God will forgive any sin save for one- the sin of unbelief:
Matthew 12:31-32
31 "Therefore I say to you, any sin and blasphemy shall be forgiven men, but blasphemy against the Spirit shall not be forgiven.
32 "And whoever shall speak a word against the Son of Man, it shall be forgiven him; but whoever shall speak against the Holy Spirit, it shall not be forgiven him, either in this age, or in the age to come."
Again, in Mark 3:29 -
"But whoever blasphemes against the Holy Spirit will never be forgiven; he is guilty of an eternal sin."
Blasphemy against the Holy Spirit is simply unbelief.
Showing a "lack of reverence" for God is certainly forgivable, but when one insults the Holy Spirit, he rejects it, and therefore dooms himself to eternal damnation.