I don't really think there's much need to make another subsection for different types of kernel (and besides just the vanilla 2.6 and 2.4, there are modified kernels.. don't know how many of those exist, but you'd imagine quite a few). Also, there are forums for various distributions
here. If you want to find out why a particular distro doesn't have its own forum, do a search, as this has been asked a lot.
Edit: also, this should be in the Website Suggestions & Feedback forum, but a mod will probably move it there eventually.