We have two phone lines into our house right now - one is used as our
business DSL (which is soon to become merely the "backup" line), fax and is
hooked into our alarm system. The other is our home phone. I'm seriously
considering switching our main home line to Vonage, over cable. We have
FIVE cell phones (two different providers) in our house as well, so the
likelihood that we would ever be without phone service if cable went out,
etc. is pretty low (especially since we need to keep the real phone line for
the alarm system), so it seems like a pretty safe bet to me.

Anyone have any experiences, good/bad/ugly that would help me make a
decision one way or another?