Lightest Tent Stakes?

Well, you can get Terra Nova needle stakes at 1 gram each. Great for photo shoots on the golf green on a calm day. ;-)

Sort of depends on where you pitch your gear as to whether or not "light" is best.

Mountainfitter has some new SUL stakes.

There's a thread in the gear deals section that includes some discussion of these and a few others as well.

The Terra Nova 2g stakes are a lot better than their 1g stakes. They're actually stiff enough that you can usually push them into the ground. I use these 2g stakes on non-essential areas of my shelter, usually in combination with 6-8g stakes for more key areas.