Noticias.Univision.com is a Spanish-language news site that has a tab dedicated to Mexican news. Another option is visiting ElUniversal.com.mx, the website of one of the oldest Mexican newspapers.
Noticias.Univision.com lists the most recent stories related to Mexico in order of release time. This site also has a sidebar that lists Mexican stories based on specific categories of interest, such as immigration, "people" stories and photo galleries.
ElUniversal.com.mx is styled more like a newspaper. The most relevant stories to Mexico are shown at the top, but the site contains stories from every major newspaper section, including sports, politics, entertainment and international news.