Discounts are raining down from the heavens these days as retailers try to offload old stock and do a bit of tidying up before rolling in the fresh batch of 2011 smartphones. Best Buy is keeping with this trend by treating its customers to a nice big saving on the AT&T-attached Dell Streak, offering it up for a mere $100 in upfront costs. The typical two-year commitment will be required from you, but that might just be worth it for this 5-inch Android slate, particularly if you load it up with