If you own a license of Bucket Explorer, we would be glad to offer a 20% cross product discount on SimpleDB Explorer - http://www.sdbexplorer.com/ .

We will automate the discount process within next few months via Chambal Accounts (https://accounts.chambal.com). In the mean while, if you drop me a note by clicking "contact us", I will be happy to send you a discount code.

Amazon has announced FREE trial of SimpleDB for next 6 months which makes it even more attractive:
http://blog.sdbexplorer.com/2008/12/sim ... ix-months/