My DD1 in her FYOS and for the first couple of weeks would lay in bed til 8/8.30pm but for the past week she's been going off to sleep pretty well.
A few of my other friends have said for the first couple of weeks of kindergarten their kids didn't fall asleep for ages after they were put to bed then slowly the tiredness has caught up. I've certainly noticed my DD1 has been a bit more grumpier and stropy in the afternoon and I can only put this down to tiredness.
The things I would suggest are (and what my DD1 has)
Music - DD listens to Music for Dreaming
which is fantastic, even I could fall asleep to it
Sticker chart for good behaviour
Dimmer light (might mean getting an electrican in to put a dimmer switch on your ceiling light). DD2 has one of these and it's bright enough to see but dark enough to sleep, works a treat!