I have just pushed SWX v2 beta live on the project's Google Code page!
Along with this release the public gateway has also been updated to use SWX PHP v2 beta and allow for AS3 support. You can find documentation here, which shows how to use the new AS3 API as well as provides an introduction to the new Simple Call and Custom Call methods of interacting with your SWX gateway.
Lastly, Folkert Hielema has contributed an updated Twitter service and a new Identi.ca service. Both of these services are live on the public gateway (you can test them in the Service Explorer) and also available in the SWX PHP download available on the Google Code page under "Featured Downloads".
This release has been a huge effort by the SWX development team, and has been in the works since September. I'm sure you'll enjoy using it as much as we've enjoyed coding it.
Can't wait to see what you build!