Yes, yes -- wireless functionality on the Xbox 360 does came at a fairly substantial price. What else is new?
With that out of the way, let's talk about the newfangled wireless N adapters that became available this week. $100 to satisfy your 802.11a/b/g/n needs might seem steep, and that's because it totally is, but the good news is it can be found for a little less than the MSRP. Same goes for the old adapter.
Unless you do massive amounts of high-def movie streaming by way of your Xbox 360, I don't know how necessary the new device is; unless of course you run a wireless N network, in which case it's a no brainer.
I'm beginning to ramble now, so someone ought to stop me. Is anyone here thinking of getting one of these things?