I haven't; it's supposed to be super secure but it seems complicated.
QT is simple and clean, I respect that. Blockchain too.
I'm in general tech savvy but I have not yet figured out the "paper wallet" thing. If I mess around with things too much without understanding them, I'm afraid I will lose my coins in cyberspace.
I'm a fan of 2 factor authentication using Google Authenticator (on blockchain as well as google). Big security boost.
We seem to be in the same position... I setup that Google Authenticator thing but haven't needed to use it yet. I assume if I want to sent money somewhere other than SatoshiDICE then I will be using the 2 factor feature?
I wish all this paper wallet crap was just built into Blockchain. I'm not worried about a hack as much as some regulatory action blocking access or something, just want to make sure nothing stands between me and my balance if my access to the wallet service disappears someday.