Allow me to quote the 'player pack' (for want of a better term)
To build up a Warhammer/Warhammer 40,000 army over a period of months, reporting on progress along the way. The challenge is designed to show new gamers how they can build up an effective army without blowing their budgets over a period of months, and how this can be a much more relaxed process than the insane flurry that is Duelling Paintbrushes. We also aim to show how, through cunning application of buying second hand or on special (or from Mantic!) you can acumulate $700 worth fo GW stuff for a fraction of the cost.
You can find the whole document on Google Drive.
The event is not limited to HGC members (actually, no DP event has been limited to HGC members, apart from the original - and that was a one-on-one mano-a-mano duel with gauntlet throwing and everything...) or even people in this country. If you are interested in taking part in a spot of community blogging, mixed with community service (showing young 'uns that it's not too hard or expensive to get into Warhammer IS a community service to the wargames community!), drop me a line.
If you've got any questions about the rules, let me know so Greg and I can think deeply about them, and then either dismiss you out of hand, or (slightly more likely) make changes. Or you could go and join the conversation on the Wargamer AU Forum.