Other World Computing announced the ThunderBay IV on Thursday, a thunderbolt enclosure with four bays for either hard drives or SSDs. It supports RAID 0 and 1 out of the box in OS X, and RAID 5 in Windows 7 and 8. You can arrange the drives in multiple RAID sets, which is stupid cool, and you can also daisy chain five additional Thunderbolt devices plus a Thunderbolt display off of the dual Thunderbolt ports. It starts at US$494.99 for just the enclosure, with storage options up to 16TB of hard drive storage or 4TB of SSD. [UPDATE: This article was updated to clarify RAID support for the device based on a clarification from OWC.]
Check It Out: OWC Announces ThunderBay IV, 4 Bays of Thunderbolt Storage