Keep in mind that at $0.225/gig, this is a good deal, but it's not unheard of. The difference here is that you're seeing sub-$50 prices as they size is smaller. I just picked up 3 500GB SATA 16MG drives for $120/each, so that's $0.24/gb. The 200GB/$45 would make a much more compelling boot disk though, esp as it's getting harder to find motherboards that play nice with IDE. Considering hard drives were $0.25/gb about 9 months ago, i'm surprised they haven't dropped faster. I guess those Seagate/etc layoffs could mean that the 25-50% per year price drops are going to slow down.
Bring on the <$200 750GB SATAs, so we can build easily build multi-TB RAIDs with no heat/noise issues!