Fixed. And hopefully my computer won't crash halfway through the post this time.
Here's a start. Note that I tend to look first at Italian-language sources.
www.acmilan.com/AC Milan official website. Where official announcements are made, etc. More tidbits on the Italian version than the English version, which is frequently poorly translated.
www.gazzetta.it/Gazzetta dello Sport. Italy's best sports daily. Not perfect, but generally very reliable. Website includes text play-by-play of games. Print edition includes post-game player ratings and amusing sport-related horoscopes.
www.tuttomercatoweb.com/Tuttomercatoweb is a website that collects news from various sources. It's a good place to check to see what's going on -- and it lists its sources so you can go to look at the original articles. As reliable as the sources it quotes.
www.milannews.it/New website that's a sub-section of Tuttomercatoweb devoted exclusively to Milan-related stuff. Includes player ratings and editorials from the Curva.
www.datasport.it/Datasport is a site similar in many ways to Tuttomercatoweb. It also includes post-game player ratings.
www.sportmediaset.it/Mediaset sport. Generally reliable for Milan related news, given who owns Mediaset.
www.lega-calcio.it/Lega Calcio is the Italian football league for Serie A, Serie B and the Primavera. Site includes official rosters (useful to look at during transfer season), official calendars, and sporting decisions (on things like suspensions).
www.figc.it/FIGC is the Italian football association. The official site for stuff related to the Italian national team.
www.channel4.com/sport/football_italia/Football Italia is an English website devoted to calcio. Articles are usually translations of articles from the Italian press. Sometimes things are sensationalized and they include articles from Tuttosport and Corriere della Sport, which aren't terribly reliable.
www.goal.com/ Goal.com is a website covering world football. Culls its articles from a whole bunch of sources, some of them more reliable than others. Treat with caution.
www.tribalfootball.com/ Tribal football is...really not reliable. At all. Get confirmation from 2-3 other places of anything you read here.
www.uefa.com/Official UEFA website. Has good features and is reliable for what it is.