The feature matrix for Delphi says: 'Added in 2007! SOAP features updated to support Amazon, eBay, MapPoint, and more'.
I was able to build a working client, without special workarounds for the Amazon Simple Queue Service. With Amazon SimpleDB, I ran out of luck (but not because of Delphi, see here).
Which Amazon web services have you sucessfully tested or used with Delphi 2007 (or 2009)?
Was it necessary to use special workarounds to make it work?