The Linux 2.6.32 kernel has been supported for the long-term since its release in December of 2009. More than two years later of supporting this kernel that's found in Ubuntu 10.04 LTS, among other Linux distributions, Greg KH will no longer be frequently releasing updates on the 2.6.32 code-base.
As said in the Linux 188.8.131.52 announcement, "This is the last 2.6.32 kernel I will be releasing. The 2.6.32 kernel is now in "extended-longterm" maintenance, with no set release schedule from now on. I STRONGLY encourage any users of the 2.6.32 kernel series to move to the 3.0 series at this point in time."
Greg may release future updates to the Linux 2.6.32 kernel, but it's no longer on a defined schedule. The next long-term Linux kernel support series is the Linux 3.0 kernel.