vvvv group has released beta 21 of vvvv v4.0. This new release comes with the following features:

• Pixel precise 2D rendering within 3D scenes.
• Text and sprite rendering.
• Billboards and one sided objects.
• A more versatile Multi-screen technique.
• Spreadable ex9 primitives.
• More performant caching with known switches and S+H nodes.
• Faster patches in hidden tabs.
• GUI enhancements for module writers (middle click an iobox).
• HID nodes for driver development.
• More possibilities for plug-in developers (mesh and layer outputs, enums in and out).

A more detailed change log is available here.