for anyone else concerned about losing their money I highly recommend the following free way to secure your wallet.
1) Install True Crypt on your PC/laptop and create an encrypted volume that is only mounted manually.
2) Install Virtual Box.
3) Create A Linux virtual machine inside the encrypted volume ...
4) Install Armoury, Bitcoin Client, Litecoin etc into the linux virtual machine ...
5) Create your encrypted/password protected armory, litecoin and other wallets inside the virtual machine.
6) do not use the virtual machine for anything other than Sending and receiving crypto transactions, do not install anything other than the bare essential tools you need and do not surf the internet with it.
from inside the virtual machine you should also be able to create a paper wallet for cold storage.
This only works if you never use the host (hypervisor) for anything but launching virtual machines.
If the host is compromised: so is the virtual machine. Keeping it encrypted is about the same security as keeping your wallet encrypted. If you never spend funds, an attacker can't either (assuming the passphrase is secure).
How can two wallets be made to transact at the same time with a single transaction?
If all else fails, this can be done manually.
Coinjoin transactions take advantage of this.