Odds are that if you check in on my blog, you're already aware of this, but I wanted to point out that Justin Isaac of Halls of the Nephilim
has just put out a great little supplement for Swords & Wizardry
focusing on...well, the Nephilim...
It's four pages of material (plus cover and OGL) well worth the $0.99 price tag. You get the Nephil as a racial class, four different types of Nephilim as monsters, and some magic items...along with a very interesting racial background that, honestly, could probably be accepted by some theologians who seriously ponder the origins of these giants. This is clearly a lovingly crafted work, which I guess is what you'd expect from a dude who calls his blog Halls of the Nephilim...!
You can find it on RPGNow right here
...and should find use for it in a traditional fantasy game as well as in adventures inspired by the Nephilim.
Heck, maybe you could even (as suggested by Tim Brannan
) take some inpiration from Ken Ham himself and have a little campaign based on the world as some believe it was...
Looks like fun to me...!