This is truly a loss to all of us who are fans of porn. I fell in love with Anna the first time I saw her -- she was an absolutely out-of-control sexual dynamo who wasn't just in the business for money, as important as that is, but because she also enjoyed it immensely...and you could tell in her performances. IIRC, Anna started out in amateur videos and then made the move into professional porn. When she was on screen, she wasn't "acting" -- she was genuinely having a great time.
I used to have a fairly large collection of her pics and vids, but I lost them all when my computer crashed a year or two ago, and most of the sources for her stuff on the web have pretty much dried up...and that's too bad, especially for you new guys who never really got to see her in action. One of the hottest scenes I've ever viewed in my life was the one with Anna and Jeanna Fine giving some black guy in an African headdress one of the best blowjobs ever recorded on video. Amazingly hot!
Rest in peace, Anna. The world is less beautiful tonight.