Congrats to the Duostack guys! I was lucky enough to co-work with them while they were in Pittsburgh working on their previous startup (we were both in the Alphalab incubator). They have a lot of experience and I know will be very successful with this venture.
I'm liking the new site. The old site's grey and black made it seem very enterprisey, but now the blue and textures and such give it a much "younger" feel to it. As you know, the web (in general) is blue...
The service is pretty slick, and it's nice to have a 'true' open beta without any coupons & whatnot needed.