For me it hasn't worked out too well. Their 70/30 split of the fee means peanuts for me and I haven't been able to make cashout. I've had a lot more success with payperpost and blog to profit which both pay just fine If you want more info, my blog link is in my sig and click on 'proof of payment' category
I've been doing okay with linkworth I have a few regular advertisers and some work though the posting part of it has not been going well the last few months. They do pay though, when you make payout. I also use pay per post and they are great, and do pay, but if your looking to keep your pr stay away from them. Not everyone has lost it, but you do run the risk.
Payperpost pays after 30 days If 30 days happens to fall on a weekend, sometimes (not always) it might be 31 or 32 days. But I've never had a problem. Forgot to mention there is no minimum to get getting paid. Whatever you earn, 30 days later it's in your paypal account