More useful links:
lkml.org linux-kernel mailing list
kernel.org the home of the Linux kernel
http://linux-news.net linux distro news.
The following sites have regular updates relevant to the Linux Kernel.
Linux Weekly News - follow the kernel link (changes weekly) (the current kernel page is always http://lwn.net/current/kernel.php3).
Kernel Traffic - a digest of what was discussed on the Linux-kernel mailing list
Kerneltrap - news on various free OS kernels