For those of you planning to snag a new iPhone 3G S unit from Best Buy, you’ll also have the opportunity to purchase the chain’s rare (and somewhat pricey) accident insurance plan. According to AppleInsider, Best Buy stores nationwide on Friday will begin selling the next-generation Apple handset on launch day, albeit at the big-box retailer’s usual 10 a.m. opening time instead of the early hours both Apple and AT&T promise.