Cold-wallet minting is not good for the network, but we do need safer options. In this thread ( http://www.peercointalk.org/index.php?topic=2467.0;topicseen) an alternative has been discussed where you have the coins on-line and benefit the network but provide more safety with multi signatures.
This basically means that you need one key to open the wallet for minting and that you need another key for spending any coins in your wallet. There are variations of the exact implementation. I would advocate for such an approach.
Although I agree this is a good feature to have, I'm not convinced that this is a top-priority given the current health of the network.
To me a higher priority would be to make it more user friendly, which is something already under development (hopefully included in the final v0.4).
Just creating cold wallets can be done here: wallet.peercointalk.org There is also the related funded project on peer4commit: http://peer4commit.com/projects/3 to improve this service.
Another good implementation of a cold wallet is worked on here: http://peer4commit.com/projects/9 (PeercoinArmory). This is still in the early stages.