Another tool to learn about multisig and manually create multisig addresses or spend their outputs (and I think it can even be used offline) is
http://coinb.inIf you want a multisig wallet that just works, your best bet right now is probably GreenAddress where you can get a 2of2 wallet recoverable by nLocktime transactions in case they ever disappear and optionally a 2of3 wallet recoverable manually (maybe through something like coinb.in).
Electrum would be another good choice, but then you have to manage all the keys yourself and it's only really secure if you have an offline computer for signing (and in that case, it's easier to just set up a watch-only wallet online and keep the seed offline). I haven't really done much with Armory, but I hear it comes highly recommended by those who have used it.