Western Digital's Caviar Blue line is the cheapest of all the Caviars (which includes Green and Black label drives), which makes the addition of a SATA 6Gbps interface a groovy addition, even if not fully utilized.
"We've added a SATA 6Gbps interface to our award-winning WD Caviar Blue and WD Caviar Black desktop hard drives in capacities from 250GB to 2TB," Western Digital said . "This transition to a SATA 6Gbps interface aligns with the introduction of SATA 6Gbps supporting chipsets and motherboards coming to the market."
As far as the Blue label Caviars are concerned, these come in capacities ranging from 250GB to 1TB with anywhere from 16MB to 32MB of cache. Street pricing ranges from around $45 (250GB) to $80 (1TB).