There are some out there that do pay out but not many.
I am a member of Ciao and they do pay out regularly and the surveys aren't too bad. You can also earn more by doing reviews etc, but not sure how much as I don't do this myself.
Another good one is YouGov, more an opinion poll site but they pay approx £1 per survey and they aren't that bad either (they use the results of some of these in the papers). You have to earn £50 before they pay you and it takes about a year ish, so not a massive earner but good for the occasional cheque for next to nothing. I have had £50 off them and already £30 into my next payout, and all for 5 mins of my time occasionally.
Another, TNS. You get surveys every so often and they convert your points earnt per survey into Nectar points as and when you have done a survey. However, I think you have to be personally invited to join them now, not 100 sure, but thats what I heard last.
Also, I would say don't bother with Test & Vote. i signed up with them a while ago and you have to earn points for vouchers but it is very hard to reach the target, and they don't even credit you for half the surveys you do, you have to badger them so all in all not worth it.
So, you can earn a few quid from surveys, but your could never make a living from it, but the occasional cheque for a few mins work every so often is nice.
Hope that helps!
"YOU KNOW I THINK I RECOGNISE YOUR FACE, BUT I'VE NEVER SEEN YOU BEFORE!" Noel Gallagher.