it won't be available by summer, the 40nm parts are due in april/may(maybe june-july) so they have no reason at all to make this in mass quantity or to keep it in the channel for long. It will never ever be good value, at launch it will be incredibly expensive and a few months at best from having a single core using less power, creating less heat and being almost as fast.
Simply if this card was out on time, 3 months ago maybe it "might" be worth it, as if it was available 3 months ago they'd not have screwed up 55nm and it would be cheap. Now it will be expensive and on top for such a short time its not worth it. SEriously buy 2x 260's if you want, or 2x280's, buying this is just stupid frankly.