I'd still be watching it if Network 10 stuck to a proper airing schedule!
They've become like the 9 Network with Top Gear and The Big Bang Theory - They air each episode at a different time every bloody week and mix it with old episodes!
(And they wonder why people download instead of watching TV )
Back on track...
That's excellent new to hear that they've been picked up for a 7th season, I've not seen anything past the end of season 5 (*Potential Spoiler: Where Sam goes to hell after his Devil possession, Castiel's head explosion was awesome! ), so it's good to hear that there is plenty to watch after that.