If you buy crystallized ginger and eat it like candy, you'll be able to appreciate this drink. It is considerably more intense than the designer ginger beers on the market - in fact the initial impact on the senses is on a par with shots of tequila, with the added benefit that it sits you straight up in your chair (something you wouldn't expect from multiple shots of tequila).
Don't run out and buy a pomegranate to make this drink. What you need is the concentrated juice, often called "pomegranate molasses".
Get a full half pound (8 ounces) - more if you please - of ginger. This is not as extravagant as it sounds, as ginger isn't terribly expensive fresh. I believe the last time I bought it, it cost $1.69/lb.
Put the ginger in a blender, and fill the blender the rest of the way with water. You might as well use good water, because the flavors in this drink don't mask chlorine very well.
Blend it up enough to chop the ginger into very small pieces, but still coarse enough to be caught by a strainer. Let it sit for several hours so the spice can be completely infused into the water. Yes, the water is going to become *very* spicy.
Strain the water into a large bowl, and then squeeze the ginger pulp for its remaining liquid.
Add 1/4 cup of pomegranate molasses. Stir until evenly distributed. Add either sugar or Splenda to taste.
After the concoction is sweet enough to tolerate, you may decide it needs to be more fruity. In that case, continue adding pomegranate molasses to taste.
I mention tequila in the beginning because the ginger-pomegranate drink is ideal for a party where some of the attendees do not drink alcohol, but would still like to let their hair down and get jiggy.