We are now providing Sandra USB versions on one of the fastest USB3 flash disks – the SanDisk* Extreme! With read bandwidth ~200MB/s you won’t be waiting for Sandra to start off the USB drive (write speed is not bad either at ~60MB/s).
Now they are not the smallest of flash drives but then again you are unlikely to lose them. Here they are for your viewing pleasure:
Sandra USB on SanDisk Extreme