Following news that Amazon chopped pricing on the Palm Pre to an attractive $99.99, Walmart has swooped in to undercut the massive online retailer — albeit just for the long weekend. Truth be told however, we’re not sure what an extra $20 is going to do if the jump from $200 to $100 wasn’t enough incentive for those debating whether or not to take the leap. What’s more, the deal involves a $100 mail-in rebate whereas Amazon’s $100 price is out the door. Whatever the case, if you’re okay with a smartphone that will cost you $80-$100+ per month, that extra $20 entry fee should hardly be keeping you from snagging a Pre. Walmart’s deal is good through tomorrow so if the hassle of a rebate is worth saving $20 to you, better act fast.