For anyone interested, this is going to be on sale from April 2nd - 8th as part of the Microsoft Game Studio sale. I don't know what the discount will be, but Major Nelson tweeted that it is part of the sale. I'd guess 50% since that's what it was previously discounted last Winter and because the discounts cap at 50%.
"Modern Biology is Chemistry, modern Chemistry is Physics, and modern Physics is...crazy." - Mark Peyron