This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Not really possible in browsers. You can't even swap to a 'Please wait' page. Personally I think you are better to provide a explaination that the operation may take a while (like the way they do it at hotmail) and leave it at that. Dave