Regarding seeds, you can move some of accounts to a new wallet and generate new keys for the accounts in the new wallet.

Is the way an account name is moved to another seed, by importing a backup?   

I have a lifetime membership account.  I have some accounts made with it.  Now I need to segregate business accounts from personal.

Is it possible to move some of those sub accounts into the business top level account?

So if I understand correctly:  With any transaction, I can attach a memo, basically a text string?  The receiver &  sender can read the text string, but nobody else?  While the memo is attached to the transaction, the private key that unlocks the memo can't send any coins from the account?

Am I understanding it correctly?

Hello,

Quick question on accounts & wallets security:

If an account is compromised, meaning the brain key or backup file is leaked, does that expose all the wallets the account holds?

Conversely, I assume, if a wallet brain key is compromised, only the funds in that wallet are lost. The hacker could not get access to the other wallets without their corresponding private keys.

Is this correct?

... front end library did you use on Bitshares 2.0?

Looks awesome!

I'd like to use something similar in a project.  Where can I find it?

This site seems to be down:

http://www.bitsharesinfo.com/wallets/cold-storage/

Is there an up to date tutorial for BTS cold storage somewhere else?

I'm no security expert, but from my understanding  I think lack of randomness is your greatest risk in a brain wallet.  You can't use a phrase found in any book, song, movie...or anything that would subject you to a brute force attack.  It would truly have to be random string of words.   (And then forgetting them seems like a significant risk.)