Yes, but withdrawal is not up yet for Bter->Nxt AE
I'm using both. At home I use the downloaded NxT client. Away I use trade.secureae.com.
I'm nervous putting in my private keys on a website, but they seem to be legit.
This is exactly the point
The key maps to an address, is all. Those 12 words are your key. You can open a new account with any key. If you hold anyone else's key you can open their account. But the odds of someone guessing your randomly-generated key? Effectively zero.
Correct. It is a "brain" wallet. The key is your passphrase which is in your brain. Mine is in my password manager tool.
I feel like this is a huge problem with nxt that needs to be resolved... (Maybe with trustless 2 factor multisig on your phone). I am so worried that if anything or anyone was able to get their hands on my password then what the hell would I do? There is no "change password" functionality. I would need to go through my assets one by one and transfer them to a new account. Followed by sending my nxt(since I need my nxt to transfer out the assets). With bitcoin it's easy because you just send all your coins to new address, takes a second. With nxt you possibly have so many things in your account; this lack of 2 factor or multisig is a massive problem that needs to be solved asap. I feel paranoid as shit entering my password into secureae. My single account holds everything I own in nxt, including a massive investment in supernet. In bitcoin I would have had 90% of this in cold storage but that does not appear to be possible with nxt and is an extremely paranoia bringing feeling.