It never is.
But, Debian runs a kernel just like the others, with libs just like the others. :-)
You just have to match a Netraverse kernel patch with the version of the kernel you are running (2.4.20, probably, on late model Debian installs). There won't be a pre-built kernel module like for the RedHat distros. No biggie, you just build it.
Just like Oracle: it's only "certified" on RedHat and SuSE, but I run it perfectly on Debian. Used the same installer, as well.
Regards,
-scott anderson
"Welcome to Rivendell, Mr. Anderson..."