Looks like NetDrive may be having the same issue as CloudDrive. Seems to me that Amazon is willing to work with NetDrive as long as they change their API calls. Is CloudDrive throttled due to the same reason?
http://www.netdrive.net/notice/
I'm on .381 and uploads are nice and stable, but still being throttled to 5Mbit.
Any update on Amazon approving your Production build? (i think that's what is going on)