There is documented (http://pycassa.github.com/pycassa/) behavior of pycassa returning timestamps on insert via ColumnFamily and ColumnFamilyMap. This appears to not be true anymore as of 1.3.0. 1.1 used to do this. In 1.1, there was a "return timestamp" at the end of ColumnFamily.insert(). This now appears to pass through to the lower layer, which returns None. Was this changed on purpose?
Return timestamp from insert() methods