I have added on another topic that BFL takes a cut when refunding customers over paypal payments. I have included a screenshot for people to see.
https://bitcointalk.org/index.php?topic=136392.msg1774005#msg1774005I would exercise caution if you plan to order from BFL as they have not been very honest with their shipping dates and 1GH/1W power consumption rates as was promised previously to pre-order customers.