So this one is an oldie, but maybe a goodie too???

I'm bringing it back from the "dead" b/c a newer version of motherboard is heading my way (nuthin' fancy, just a small upgrade to SATA3 and maybe this platform will finally allow me to run the 6 cores of my Phenom X6 CPU?).
Anyways, that board has dual NICs. Both of them are RealTek chipsets, supposed to be exactly the same stuff I'm running on my board right now. So from a drivers' side of things, it may be a good-news story, aka plug-it in and run!
Therefore, I am curious how one could take advantage of such a configuration?
Specifically, I now have that 1Gig fibre feed into my house, OS/2 shows a pretty decent 820 Mbit/s throughput rate on average when I test (speedtest script).
1st idea is to setup one NIC of all WAN traffic, while the 2nd serves the LAN only...either way, I do not have much traffic on either one, so I'm not sure if the effort and added complexity is worth it?
If not, how would one split up the OS/2 tcpip traffic to take advantage of the two ports?