This is especially important with everybody increasingly using wireless networks, which are usually unencrypted. You don't want your passwords flying around unprotected over the air!
The two new security available are:
We now use SSL (encryption) not only for payment processing, but also to let you create new accounts and change your password: the two pages that would otherwise send your password across the net in the clear.
All of this will happen automatically, so don't worry about doing anything special. If you have questions or find problems, contact support and we'll help you out.
(P.S. We'll be supporting HTTP Digest Auth and challenge/response in the interface handlers soon, too.....)