MilesBuzz! - Sites to check Award Travel options

Hello All -

I hope this is going into the correct forum. What are the best sites to see potential Award Travel open days? I have a bunch of miles spread over a variety of airlines / AmEx rewards, and am trying to get a biz class from West Coast to Asia (Singapore) in mid-Jan but can't find anything. I find some web sites have great navigation to see what is possible, even on their partners, so I thought people here might have some suggestions.

Thanks,
Mike

Perhaps, TallMikey, if you indicate with whose mileage programs you have your frequent flyer miles other posters can share some productive websites with you.