Personally I would avoid buying anything from e-cig.com.
Their products do not hold up, most of the time they do not work when you first receive them.
And if you're lucky they will work for a week, and then crash and burn.
Their customer service is terrible.
If you e-mail them and tell them of the problem, then, if you're lucky you get an e-mail back, ignoring the problem you have, all they do is refer you to their "problem solving page".
There are sellers on e-bay now.
Be careful ordering directly from China.
I ordered and this morning I received an email that it will take up to a month for me to receive my order because customs in China are inspecting packages very careful because of the Olympic games.
There are companies who distribute e-cig in the USA now, njoy is one of them, also one poster here sells them.
There's a list here somewhere, that Smokey Joe posted.
general-list-of-suppliers-t5.html
Hope this helps.