Last year’s NAB, Thunderbolt was just announced so there were hardly any real products. This year, every major disk manufacturer released Thunderbolt drives.
LaCie has several different disk offerings with Thunderbolt connectivity. The Little Big Disk comes in sizes from 240GB to 2TB and features dual Thunderbolt ports for easy connectivity. The 2Big model provides RAID flexibity with sizes from 4TB to 8TB and can hot swap drives. They also showed a eSATA hub to allow you to connect eSATA drives at full speed via the Thunderbolt interface.
Western Digital was showing their Thunderbolt Duo dual drive storage system. The system allows you to configure the the disk in RAID format to mirror the drives for data protection or use them as two individual drives for more storage. The case allows you to swap out and replace drives.