This week's book giveaways are in the iOS and Features new in Java 8 forums. We're giving away four copies each of Barcodes with iOS: Bringing together the digital and physical worlds and Core Java for the Impatient and have the authors on-line! See this thread and this one for details.
I'm not aware of a mailing list as such, but you could use any of the "web page watch" services to have a look at the download page (.e.g http://tomcat.apache.org/download-55.cgi). Those would change only if a new release is made available.