I love the NFJS stop in Des Moines. It competes for the title of "Friendliest" stop on the NFJS tour. It also has a plethora of smart, energetic folks looking to remain on the cutting edge.
To make it efficient for the attendees of my sessions to get to the resources of my talks, I'm listing them all in this blog post.
Encryption on the JVM
Hadoop
Maven 3