I mined for 13 hours w/40MH on the official pool just after launch and still have received no coins...
I've been mining on suprnova with only 5.2MH and got everything despite the fact that coins get confirmed for 10 hours (120 blocks).
oh wow i just noticed that i got the 120 blocks wrong, its lowered now to 30 blocks you'll get the payments much quicker now, sorry !