The first version of txAWS just made it out the door, thanks to prodding from Scott Moser, who is helping to get txAWS into Ubuntu Lucid Lynx. It's been uploaded to PyPI now too, so you can do the usual (easy_install txAWS), or you can download it from Launchpad.
For those interested in writing async code for the cloud, txAWS is the library for you :-) What's more, if you're interested in contributing to a Twisted-based project, this could be just the thing to get you started. The use of Twisted is pretty basic in txAWS (though we do adhere to various coding idioms pretty strongly, to enhance maintainability), and would be a nice introduction. What's more, there are lots of exciting features and work still to do, and you could really make a difference.