Ok, for the record, this is not exactly "lemonade." This is also not exactly "limeade." Lemon-Lime-Ade? Whatever you want to call it, it's awesome. I've made lemonade with honey, agave nectar, and any number of other sugar substitutes, and they were all good...but this by far the best tasting lemonade I have ever tasted, much less made. It is good mixed with liquor (tequila, whisky, vodka...all good!), it is good simply poured over ice. It's just awesome.
What you need:
4 cups of fresh lemon/lime juice--I actually counted today, and I used 15 medium limes and 6 huge lemons
2 1/2 cups of sugar
That's really it. :) Boil the sugar with equal parts water until clear, and juice all of your fruit over a sieve. Pour the juice and sugar syrup into a 1 gallon pitcher and add enough ice to make it cold, and then top it off with water. Serve over ice.