nice thing, but price is around €650 with taxes, ex. delivery, at the moment
considering that price most likely will fall ~€100 in next month or two (due to [most likely] limited supply of 6990 at the moment and fact that gtx 595 is coming soon), and that 6990 is probably no more than 10-15% faster in mining comparing to 5970 I will definitely wait until end of April with purchase
5970 that offers 90% of 6990 processing power can be still purchased for 70% of price, and you can get them used which make price to power ratio even better
still, looks like great piece of hardware