The following distributions do NOT need a kernel recompilation to run NuFW [1]:
Fedora Core 6 (kernel 2.6.18)
Debian Etch (kernel 2.6.18)
Debian Lenny
Also, please note that a Linux kernel recompilation will only be needed on the Firewall itself (the host running the nufw daemon). The nuauth daemon should run on any POSIX system, and clients are, by essence, multiplatform (meaning, NO kernel dependency).
| [1] | Please let us know if you find others ;) |