Amazon (AMZN -1%) roundup: 1) Amazon is set to expand its AmazonFresh grocery delivery business, in trial mode in Seattle for 5 years, to Los Angeles "as early as this week" and San Francisco later this year, Reuters reports. An industry consultant claims Amazon, long expected to expand its grocery ops to areas where sales tax is no longer a concern, is targeting up to 40 markets. Grocery chains (SWY, KR, SVU, WFM, TFM) can't be thrilled, particularly given Amazon's pricing history. 2) eMarketer estimates Amazon generated $610M in ad sales last year, and will produce $835M this year. A targeted ad network could fuel additional growth for the business, increasingly seen as a threat to Google (GOOG).