It appears the $99 iPhone from Wal-Mart we told you about was in fact too good to be true. However, the big-box retailer does appear to have plans to offer the iPhone 3G at a discounted price. Don’t go getting too excited, though: The discount isn’t much. In fact, it’s a mere $2 under what you would get from AT&T. According to Apple Insider, a few Wal-Malt stores have jumped the gun and are starting to advertise Apple’s iPhone 3G before it’s officially rolled out later this month. Various readers have reported