Hi,
you are pretty much right about there not being a lot of info out there for 1 gallon brews. Before we begin though, it must be said that I am by no means an expert, having only done 2 AG brews so far. I aim for a 2 gallon brew to fit my little corny's, but the process would be the same for 1 gallon or 5 gallons AFAIK.
I use some beer software called beer engine, and plug in a normal 5 galon recipe. Then I adjust the recipe to the required brew length (2 gallon).
My first brew I used the standard AG techniques, mash tun, boiler etc. Then I found this site :
http://www.thebrewingnetwork.com/forum/viewtopic.php?t=4650
The method is called Brew in a bag BIAB. It really does work well.
Mashing and boiling are done in one pot, so you equipment list is a lot less than normal.
The boiler/Pot your will need has to be big enough to hold all your water, so for a 1 gallon (roughly 4 liters)
you would need a total liquor of 6.5 liters or around 2 gallons. Add in another 20-30% space for boiling and the pot size should be around 2.5 gallons. as you only need 1 pot for this, get the biggest one you can store easily.
One thing to remember is that your strike temperature need only be about 2-4 degrees hotter than your required mash temp.
It is a simple method, but gives good results so far with me. If you want some more info, give me a shout.
Travis