Reflector message used to have time repeated twice {0} in two places and looked like:
[INFO] 02/21/14-23:24:50 In Reflector loop. Received 0 of 1 responses from:        02/21/14-23:24:50

changed to index 3 and also enabled logger output as you're commonly just looking at the ami.log when it's running vs having to bounce between ami.conf and .log to see what the reflector is saying.
Make reflector logging a bit clearer.
Error out when DSE is requested without --username or --password
Bake with the newest AMIs including the now available sa-east-1 HVM instances