Beta or not this very new 77.30 DorceWare driver is being distributed with the release of the new Battlefield 2 Demo, and thus EA released it.
Battlefield 2 requires NVIDIA users to have the very latest drivers. So they highly recommend you upgrade to the latest NVIDIA drivers.
Suffice to say we repacked them to cut down the size from 26 MB towards and now mirrored them here on Guru3D.com this is an international version, thus it supports basically all languages.
Basically any geForce graphics card is supported in this driver. We have a discussion thread open on these drivers right here.