NVIDIA can be applauded for continuing to support the Linux 2.4 kernel this long seeing as the kernel has been EOL'ed for a while now and the Linux 2.6 kernel series is nearly one decade old.
NVIDIA shared on their web-page that the upcoming 319.xx Linux graphics driver series will be the last to handle the Linux 2.4 kernel. After the 319 series, only the Linux 2.6 kernel and newer will be supported.
MVIDIA's legacy Linux graphics driver branches, the 173.xx and 304.xx series, will continue to maintain the Linux 2.4 kernel compatibility. The NVIDIA 319.xx series will also be a long-lived branch so if anyone is still by chance using the Linux 2.4 kernel with modern graphics hardware, they will continue receiving updates for a while.
Kudos to NVIDIA for continuing to maintain support for old Linux installations for so long.