Well, I don't do a ride every week or anything, but I actually live in the Dandenongs. Lots of nice trails. And Hills. The Dandenong Tourist Road is REALLY fun to ride down, just coasting at about 50km/h. (Anymore, and you'll fall off, there are sharp corners.)
I should be getting a new bike very soon, so I'll be riding around here more often.
MoD