The coffee house that opened recently in the Alameda MarketPlace (1600 Park St.) has added free WiFi. I can't judge the coffee, but supposedly it's roasted on the premises. Decent selection of baked goods and Dryer's ice cream. No sandwiches or other savories that might be appealing later in the day, but I think you could probably bring in food from the other purveyors in the MarketPlace as long as you bought a beverage.
The Beanery, 6am-7pm Mon-Sat and 7-7 on Sunday.