You pose some interesting questions starcraft.
There isn't much to do except lower the price by, say, 50 dollars or so on the top models and perhaps release some sexy bundles!
They could also start selling Elite's or Pro's with a prepaid XBL Gold subscription for a given time, a year or two, just to sweeten the deal and make a slight carrot out of their awesome online.
I'm really glad this is happening now, my TV will be in place in exactly one week and it seems I'll be able to buy both a PS3 and a 360 Elite for 2500NOK now... 
Good times!







