Since my grog tends to get such great reviews, I figured I'd post it here for posterity, and so that anyone else can brew it, tweak it, whatever. I'm not proprietary, and if other people wanna be able to drink it when I'm not around, who am I to stop them?

The story that I compiled when I was first investigating grog was that Vice-Admiral Edward Vernon was the one who ordered the addition of lime juice to the British Navy's daily rum ration (which had previously been watered down and flavored with sugar and spices) when it was discovered that citrus prevents scurvy. Since Vernon was known as "Old Grog" for the grogram (wool, silk, mohair blend) coat he habitually wore, his mixture therefore acquired the name of "grog" as well. Now I see that that's not really true, and I'll just link to Wikipedia and let you read it yourself: en.wikipedia.org/wiki/Grog

Now for my recipe. I mix it in empty 1.75-liter handle bottles, just because it's convenient. Feel free to adjust as necessary for your conditions:

Put a saucepan on the stove on minimal heat. The mixture should never actually boil, just warm up a bit.
Pour an 8-oz bottle of ReaLime juice into the saucepan. (Don't try to use Rose's lime mixer crap, go for the real thing)
Rinse the bottle out with water twice, into the saucepan (add 16 oz of water to the pan, and make sure that no limey goodness escapes)
Add sugar to the mix, to taste; stir and continue heating until it dissolves. I do about a cup of sugar for the 1.75L handle bottles, but I have a sweet tooth. Not everyone likes it that sweet, but if you got it from me, that's how much sugar was in it.
While that mixture is working, we need to measure the rum. Refill the lime juice bottle with pineapple rum (another 8 oz), and pour it into the handle bottle you're going to be ending up with.
Switch to spiced rum, and refill the lime juice bottle one and a half times (the "half" I usually do to the top of the label)
Once the sugar is dissolved, pour it into the bottle on top of the rum (a funnel will probably help).
Fill the rest of the bottle with water - you may want to rinse the lime/sugar out of the pot and/or the run out of the measuring bottle with the water, before you use it to top off the handle bottle.

Of course the best, most efficient way to do it is to set up an assembly line kind of thing, and have multiple bottles in various stages at any given time. It took me about half an hour to make the four bottles I took to Interfuse this year.

This mixture comes down to about 10% alcohol (20 proof), because I don't like the taste of alcohol. If you discover any other good recipes, let me know. At IF06, Kitt dubbed this mixture Milliways grog (because she discovered it and me at a dome at the back end of OA, and said that it felt like the end of the universe back there), and I'm going to run with it, to differentiate this one from anything else you whack-jobs might come up with. :)

To draw once again from the late, great Douglas Adams, Share and enjoy.