To participate in auctionthing click "Register" at the top right of the page. Once you have registered you can sign in and start bidding.
To becoming an auctionthing seller you can request an invitation code by clicking on the link "Become a Seller" in your profile. Only serious sellers will be considered, so please give us an idea what kind of work you intend to offer. Registration is free and there is no fee to place an item. Sellers are charged a 10% commission fee when a lot is sold.
That's it in a nutshell. If you are familiar with other on-line auctions you should have no problem. You might want to check the FAQ for more detailed information on the bidding and selling process.
SPECIAL OFFER FOR NEW MEMBERS: If you sign up before September 2012 your first trade is free.