Ummm.... After selling 165k its first week, exactly what did you expect it to do? Sell 50k+ a week?
It's a friggin 399+ (pound) system!!!! Of course it's not gonna sell great after launch. The fanboys that had the cash got it, and now the people that casually want it are going to buy it.
17k isn't too bad, provided it doesn't drop much more.
15-19k a week (similar to Japan) should be pretty good and typical. At a 2.5x rate, that'd be around 52.5k a week in Europe..Slightly higher than it is in the US (42.5k a week) and far above Japan (17.5k a week).
So the PS3 is moving around 110k units a week, or 440k a month (give or take) vs. 1m-ish for the Wii and 500k-ish for the 360.
Not bad for a $600/40k yen/399pd/Euro system.
Back from the dead, I'm afraid.