Answering my own question --
(1) When I called the Sony support line, they said that it could not download directly.
(2) The people at Best Buy agreed with this position.
Today (07/09/11), I returned to Best Buy with my camera and USB adapter. We tried it on both the ASUS (with its kepboard USB hub) and the Toshiba Thrive (with its direct USB port). In both cases, it worked like a charm through the DCIM.
Thus, downloading to Android tablets is a simple matter.