Apparently it's a powder you mix with water and it turns a thick, yellowish yolky color. It looks kind of yucky, but if you're baking with it, who cares.
There's a list of places you can buy/order it from including some online sources, and their website lists some yummy looking recipes using the product. The website also mentions that if you buy the product between now and 2014, the company will donate 10% to Compassion Over Killing.
The ingredients for all you label lookers:
Nutritional Yeast Flakes, Sodium Alginate, Kala Namak, Beta-Carotene
Blend contents with one liter of water. (For Vegg users who wish to not mix all at once, use this conversion: Blend 1 teaspoon of The Vegg powder with 1/4 cup water equivalent to about two to three yolks!)
I had to google Kala Namak, since I had no clue what it was. Apparently it's an Indian black mineral salt used in cooking, that actually is more grayish pink in color and has a sulfurous taste, like hard boiled eggs, hence the use in an egg alternative. It's also apparently used in Ayurvedic medicine for high blood pressure, and is said to help with flatulence and heartburn.
However, the sodium alginate (derived from brown seaweed) might be problematic for some.
If you purchase the Kala Namak salt through Amazon, I get a few pennies. In fact if you purchase anything from any of the sponsors on the right, I get a few pennies.
Please note, I get nothing from The Vegg other than satisfaction from sharing some interesting information.