Here is what is in the first pack:
2 skins: Nautilus (3.1 revisited for 3.2)
Paisley (a purple skin in memory of Prince)
20 sawsynth presets
8 stereo PCMsynth presets
3 stereo beatbox presets ( brushcat, fatdrums and stereopercz)
To get this go to the Caustic forum here:
He also have a website called aptly enough Caustic Resource. Here he have released more packs that take advantage of the latest Caustic, specially stereo samples in the sampler.
So go here and you can find even more great things like Orchestral instruments, clusters, textures and beatbox presets.
To go and check it these packs that are free as well go here: