I must correct you, NO ACCOUNT WAS HACKED. Etherdelta's website in itself was NEVER HACKED, so the site itself is still 100% secure!
What happened with Etherdelta was that THE REGISTRAR where the domain etherdelta.com was registered was hacked and the hacker changed the configuration so that etherdelta.com would point to his fake server rather than the original official one.
So, when some users (only for about 4-5 hours) didn't realize that something was strange and the look of the website was different (no chat button and no Twitter feed) they still deposited and traded, but it ended up sending their money or tokens to the hacker instead.
Once Etherdelta staff regained access to the domain registrar's record and changed the DNS back to the server it was meant to be the emergency was over.
Why am I so sure of what am I saying?
For two reasons:
1) I am hosting provider myself so I know what I am stating
2) I saw what was happening that day with my own eyes and I spotted that something was fishy, luckily the staff had already realized that when I thought about contacting them and was resolving it.
So, Etherdelta site's code, in itself, is 100% safe and NO ACCOUNT was hacked. It was only the unaware users who, unfortunately, fell victims of this evil plan.