Amazon (NASDAQ:AMZN) eBay (NASDAQ:EBAY) and other online retailers steal some of the attention from brick-and-mortar stores today. Shares of both Amazon and eBay posted big gains last week in advance of Cyber Monday sales. A growing number of retailers are offering free shipping this year.   Wal-Mart (NYSE:WMT) Target (NYSE:TGT) and Macy’s (NYSE:M) -- which have growing online operations -- are all expected to rise today. Twinkies might become the target of a bidding war. Hostess Brands which shut down its bakeries and started liquidation proceedings last week says it has received a "flood of inquiries" from potential buyers. ...