Your reward will show when a block is found, i'm working in better info/stats for the miners btw.
Yay

I only mined 0.5 BTE so far

the pool starts out slow and gradually increases. also it continues to pay out for quite a while after you stop mining.
That's a really nice thing about p2pool, you get paid even after you stop mining!
It just takes a bit to ramp up to your full payout at first.