The latest mainline 3 version of the Linux kernel is:         3.4-rc7   
The latest stable 3.3 version of the Linux kernel is:         3.3.6     
The latest stable 3.2 version of the Linux kernel is:         3.2.17    
The latest stable 3.1 version of the Linux kernel is:         3.1.10     (EOL)
The latest stable 3.0 version of the Linux kernel is:         3.0.31    
The latest stable 2.6.35 version of the Linux kernel is:      2.6.35.13 
The latest stable 2.6.34 version of the Linux kernel is:      2.6.34.11 
The latest stable 2.6.32 version of the Linux kernel is:      2.6.32.59 
The latest stable 2.6.27 version of the Linux kernel is:      2.6.27.62 
The latest linux-next version of the Linux kernel is:         next-20120516