They're still looking for AIB partners for a spring launch. Right now it's still their reference engineering samples/design.
The 400 series will be the mid range, they will have higher ranges and low ranges (can't get too much lower but they will have them supposedly) coming out later.
Based on past numbers I suspect the higher range cards are going to be 600 series, and the low end either 300 (most likely) or 200.
Remember main thing for the chrome series is very light gaming and heavy HD video work. These will be mainly for OEMs wanting more than integrated has to offer. I suspect we'll see a few HPs, ACER, eMachines, and such with these. I don't suspect we'll see Dell at first as they usually wait on stuff like this unfortunately.
As unimpressive as the scores may be this is still the meatiest segment of the market the low-entry level multimedia/'gamer' cards (ie those who look to meet min system requirements for games) and if they get even 2-5% of sales they'd be making a ton more money than they, SIS, Matrox and Ageia's PhysX made last year combined.
I don't expect them to cause huge waves in the enthusiast community, but I sure am happy to see another player, I just wish it were Matrox though.