The new U510 from PQI in Taiwan is a 3mm thick unit thatp cks a whopping 16GB of storage! Now here is a device which takes its credit card form factor seriously, measuring up at 3.3 x 2.12 x 0.1-inches, and the USB 2.0 device features a thin retractable USB jack. No word on pricing or availability, but we’re guessing it’s not going to be cheap.