That will create a multi signature transaction.
If you want to then SPEND the funds sent in that 2-of-3 transaction... that isn't implemented yet (well, if bitcoin has all 3 private keys in it's wallet then the funds will show up in the wallet's total balance and it may be selected to be spent like any other funds received by the wallet). "We" need to implement RPC calls to implement BIP 10 or something like it.
So it looks like maybe the spend isn't there yet?
That was written much later than the post you linked.
Found this beta open source multisig address generator for BTC: https://coinb.in/multisig/
Perhaps someone could look into forking it for RIC. We don't even need to use it, it'd still be a valuable asset