Just posted on my G+ page the cables and adapter I purchased to extract a SATA line from the Pogoplug V4 A3. This is what I used to connect my V4 A3 to a port multiplier compatible 4 bay SATA raid box. Pictures here: Extracting a SATA connection from a PP V4 A3 Note that I used a pair of upward and downward USB right angle adapters to move the topside USB connector rearwards as to not have to worry about disturbing the SATA cable. The components I used are available here:
22 pin to SATA and power cable
Combo pack USB upwards and downwards right angle adapters
SATA to ESATA adapter
22 pin to SATA and power cable
Combo pack USB upwards and downwards right angle adapters
SATA to ESATA adapter