Shouldn't this package be requiring //kernel// and not //kmod-nvidia//?  See comments in -i string:

# rpm -q --requires -p kmod-nvidia-100.14.19-18.lvn8.x86_64.rpm
kmod-nvidia-2.6.23.1-49.fc8  
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(CompressedFileNames) <= 3.0.4-1

_[/usr/src/f/2007-11-11]_(root@eva)_
# rpm -q -i -p kmod-nvidia-100.14.19-18.lvn8.x86_64.rpm
Name        : kmod-nvidia                  Relocations: (not relocatable)
Version     : 100.14.19                         Vendor: rpm.livna.org
Release     : 18.lvn8                       Build Date: Sat 10 Nov 2007 03:55:20 AM PST
Install Date: (not installed)               Build Host: plague-builder.livna.org
Group       : System Environment/Kernel     Source RPM: nvidia-kmod-100.14.19-18.lvn8.src.rpm
Size        : 0                                License: Distributable
Signature   : DSA/SHA1, Sat 10 Nov 2007 04:48:03 AM PST, Key ID 71295441a109b1ec
Packager    : rpm.livna.org <http://bugzilla.livna.org>
URL         : http://www.nvidia.com/
Summary     : Metapackage which tracks in nvidia kernel module for newest kernel
Description :
This is a meta-package without payload which sole purpose is to require the
nvidia kernel module(s) for the newest kernel,
to make sure you get it together with a new kernel.