I do see them rather wanting to get a $400 SKU out there, but I share earlier comments that ran along the lines of "40 fewer gigs, and that's IT for a $100 difference?" It doesn't make much sense to start splitting production again (though I guess they are still producing the 20GB in some markets, right?) and remove the wireless device or the memory card slots, etc. And if they don't do that, just what would really be the differentiation?
I guess the 80GB could remain still bundled with Motorstorm through the holidays and have, say, some extra perks (like credit that could go to your online account when you sign up for it, so you could pick up, say, $20 worth of games and somesuch. Good idea, that, as it's extra value AND gets more people signing up right away and seeing what's on PSN.) But without the hardware differences...
The difference between a 40GB and 80GB laptop drive in large bulk couldn't be THAT huge, so frankly I share the stance that they should just use the 80GB as the baseline and drop that, and retain a more expensive SKU with a stupid-huge drive (you can get 160's in a frickin' iPod, after all) and some cool bundling at the high end. In fact, I'd almost rather still see them at the $600 level with a
ridiculously cool bundle rather than feeling they have to stepping-stone about. Toss a few of the sought-after holiday titles in, a good online game (Warhawk, say, which could be pre-installed, and would also get people used to using the SIXAXIS), and whatever other bling seems nice.
They can drop that one to $500 easily enough later on just by pulling out some of the bundle. While some hardware extras on the machine might be NICE, I think it makes more sense to keep the basic design the same for manufacturing simplicity and cost reduction, and make it up with ephemeral extras.
Also, throw a frickin' HDMI cable or something in there, 'kay? Sheesh...