Bonuswhores.com just reviewed Golden Riviera Poker.
Golden Riviera is a Prima site, looks exactly the same as all the other Primas. They offer $20 reloads every weekend - deposit $50, get $20. You have to deposit the money and play the raked hands during the weekend or you don't get it.
The bonus clears at 7x the raked hands, with a raked hand being 25c of rake. So 140 raked hands to clear it. At $50 NL it takes about 75 - 90 minutes to clear the $20 bonus. Less than an hour at $100 NL.
You have to e-mail support to claim the bonus, and sometimes they're not real fast about giving it to you. I've had to write a few times to get it in the past, which is a little annoying. But it's been a while since I've had any problems.
They also give you $50 bonus on your first $50 deposit if you're new. Same clearing rate of 7x IIRC.
I try to stop by there most weekends. They've paid me more than $400 in bonuses so far, which isn't bad since I've only been chasing bonuses at all for about 6 months.
When you sign up, make sure to download "Golden Riviera Poker" and not "Golden Riviera Casino." I downloaded the casino first and was very confused. Also I still get e-mails from the casino folks.