Frustrated over the number of Internet providers that are available to you? If so, you’re like many who are limited to just a handful of broadband companies. But now President Obama wants to change that, arguing that choice and competition are lacking in the U.S. broadband market. On Wednesday, Obama will unveil a series of measures aimed at making high-speed Web connections cheaper and more widely available to millions of Americans. The announcement will focus chiefly on efforts by cities to build their own alternatives to major Internet providers such as Comcast, Verizon or AT&T — a public option for Internet access, you could say.