HushMail has a java based browser that's supposed to be all client side, but last time I tried hush, they generated keys that were incompatible with GPG2. But

HushMail has a java based browser that's supposed to be all client side, but last time I tried hush, they generated keys that were incompatible with GPG2. But yeah, like you said, if you're only checking emails on machines that are secure and in your control, you might as well just install Tbird/Enigmail. And if you're at the library or a computer lab, you can't trust the client to be secure.