You can look at
the hsv drivers club web site and also
http://www.hsv.org.uk/ which is the forums most of the drivers club people watch.
You can also
go here to see some pics of a recent meet in the UK (last weekend). There are also some threads on
http://www.hsv.org.uk/ with more pics. They even had support from Vauxhall, as Vauxhall brought a brand new VZ Monaro and HSV VZ GTO (both to be press cars).