(just to clear up a point: NXTNAUT is just a placeholder name, used to avoid confusion during the swap process, after the swap is done, we'll all be calling it NAUT.)
My last post from the redemption thread:
https://bitcointalksearch.org/topic/m.12441796
On account security: just make sure you use a good passphrase, the default passphrase generator used in the Nxt NRS client is secure.
As Nxt uses a brain wallet, password security is the only thing you have to worry about. There are no local wallet files that can be lost or stolen.
Watch out for keyloggers and Trojans, think about using a secure password manager like Keepass: http://keepass.info/
Lastly: some of you may have noticed that a mysterious (and very small) amount of NXT has appeared on your account.
If this happened to you, use some of it to make an outgoing transaction (like setting an account name).
Your first outgoing transaction publishes your account on the Nxt blockchain and increases its security.
This is a public service announcement from: http://nxtfoundation.org/