The Festival of Speed is gathering entries at the moment, private practice is on for the Friday the 4th as well.
http://vhrr.com/wp/winton-fos/
It's a joint venture between Winton Motor raceway and the VHRR - interestingly, there doesn't appear to be a Meecams entry facility.
The feature event is a 50 km Group N race, though Groups J through to R look like they're being catered for as well as Historic FFs and Vees and the Victorian MG Racing Series.
It should be good - fingers crossed that they'll not be too much rain!!!