Does Amazon S3's HTTP Uploads feature support web-hook style callbacks?

They just recently announced AWS Lambda which lets you run code in response to events, with S3 uploads being one of the supported events.

Amazon can publish a notification to SNS or SQS when an object has been created in your specified S3 bucket.

http://docs.aws.amazon.com/AmazonS3/latest/dev/NotificationHowTo.html