Checking driver version of NIC card
 

I used lspci to see what kind of NIC card I have, but how do I check the driver version/information?

Edit: Besides ethtool -i eth0. Any other ways?

lsmod will gives you the list of modules inserted into the kernel.
modinfo gives you more informations about the module.
Beside that, your distro should provide some kind of information on the module package via the package manager, but you forgot to tell us which distro you are using.

Sorry, using RHEL 5.1

Listing hardware
 

You can cat /etc/sysconfig/hwconf

or do

prompt>lsmod

to find the module names loaded into the kernel then do

prompt>modinfo module_name

Hope this helps.