Sandvox 2.6 is now officially released and is available immediately for download for customers running 2.x on OS X Lion or Snow Leopard.
You can grab it using Check for Updates or download a fresh copy directly from sandvox.com. For Mac App Store customers, please check the Updates tab in the App Store app.
Here are the complete release notes:
Extract Content feature aids in migrating previously published websites to Sandvox
Turning off 'Load data from the Internet' can cause local resources to not load properly in the Web Editor. (This will be fixed in 2.6.1.)