Linux Kernel 3.0.1 has become the stable release now and the latest testing version Linux Kernel 3.1-rc1 has been released today. There may be issues with this release since its not a stable release and you can try out with this release. Linux Kernel 3.1-rc1 is available for download on kernel.org
Recently I have posted the procedure for compiling and installing the Linux Kernel 3.0.1 in Ubuntu and Fedora.
If you like to test with this release, you can follow the same procedure that we used to compile and install Linux Kernel 3.0.1. Check the tutorial below.
For Fedora 15 and 14 – Click Here.
For Ubuntu 11.04, 10.10 & 10.04 – Click Here.
To download the Linux Kernel 3.1-rc1 – Click Here.