Summary:
1. Prominent features in Linux 3.2
== == == ==
2. Driver and architecture-specific changes
All the driver and architecture-specific changes can be found in the [http://kernelnewbies.org/Linux_3.2_DriverArch Linux_3.2_DriverArch page]
3. Memory management
4. Networking
5. File systems
6. Block layer
7. Virtualization
8. Security
9. Tracing/profiling