Mimestream, a native Gmail email client, is out of beta and looks quite good if this video, by Matt Birchler, is any indication. As a subscriber to HEY, I can only salivate when I see such great Mac apps being launched for such a mature category. The guys behind HEY brag a lot about having a unique take on email, but they seriously lack in their take on being native because their software is not and is one of their biggest problems IMHO. If only they had the guts to rebuild their client like Mimestream, it would be a real killer for me.