The folks at Audiobooks.com are celebrating Audiobook Month with a lot of specials and giveaways. The biggest of these is a monthly giveaway where you can win (among other things) a 32GB iPad, or 1 of 30 yearly gift subscriptions to audiobooks.com and other prizes.
You can enter the giveaway by clicking here. You can enter daily through the entire month of June and gain bonus entries by referring others.
I also suggest you check out this link for all the details on what Audiobooks.com is doing to celebrate June is Audiobook month.