VSS is not the only variable star organisation (although the only one focusing on the southern hemisphere!). The following organisations will be of use to you.

• American Association of Variable Star Observers (AAVSO) - The AAVSO is an international non-profit organization of variable star observers whose mission is to enable anyone, anywhere, to participate in scientific discovery through variable star astronomy.
• Bristish Astronomical Society – Variable Star Section (BAA-VSS) - World’s oldest (and some would say highest-quality) amateur-based variable star organisation.
• Center for Backyard Astrophysics (CBA) - Runs monthly campaigns on southern (also northern) cataclysmic variables.