Yup, HDEW prices (body only £515 or with 12-50 for £619) and the Amazon deal (£50 credit plus claim a free 45mm 1.8 from Olympus) are both very good deals. I'm sorely tempted but just picked up mint used GX1, so might wait and see what happens to used prices between here and the New Year... once more E-M1s become available and if Olympus announce details of the new 'affordable' OMD then I'd hope there might be a few bargains around, at the moment used prices aren't far off buying a new import.
Either that or get my Finnish friend to pick me one up when she goes home for Christmas, they're €550 (£460) over there at the moment.