I'm not on here enough to nominate sensibly - it's been a long time, but I'll have a go. Too many great people won't get a mention because I'm exhausted and forget user names!
Sagan Award - loads of candidates, but Twistor59 springs to mind, and Campermon.
Darwin Award - Again, loads. Mr. Samsa if i can only name one. Genes4Life would have been a great choice, and the rest of the Explorable team, but for the fgorum I'll give Samsa it for his efforts over the years
Plato Award - Susu exp, Teuton, Speed of Sound, Ian Tatum, Spinozagalt, Logical Bob, Zwaardjit and the Comte Serpenti all spring to mind immediately as people I have read and learned a lot from from. There are loads more: I therefore just can't nominate here, as I don't spend enough time there.

Non/stamp collector of the year - The most interesting poster in theism/nontheism has to go to: OldSkeptic. We have clashed many many times, but he has an awful lot of interest to say, and i enjoy our discussions.
Ricky Gervais Award - Oh so many! Thwoth is usually a laugh though

Agrippina is fun too.

Pseudoscience Debunker of The Year - Campermon, fpr his sterling work arguing with me. Who else? Well if I had a second nomination it would definitely be The Metratron, a good sceptic. Campermon gets my nomination though for the debate.
Stephen Colbert Award - I nominate Chairman Bill. DaveD would win if it was based on his blog though, which is excellent.
Social and Fun Poster of the Year - can't nominate. Too many. Oh ok, Blip. I nominate Blip, and Sityl who always has something worth reading to say, and I havenofingerptints too, especially for this! And Animavore, and...
Christopher Hitchens Award for Excellence in Writing - Hackenslash of course. Cali and Samsa get honourable mentions, as does Teuton and many others deserve it. Ian T for instance. Many great writers on here. Genes4life for instance is a brilliant science educator.
The Einstein Award - So many possibilities. Tim O Neil, Crank, Grahbudd, Hugh McB and DaveD all contribute masses in their own ways, and Hackenslash is an obvious candidate too. If I have to take just one I'll go Tim for heroic efforts in the face of Christ Mythers.

I have missed out loads of people i really like and respect though

But it is fun!
j x