Well, for now I've put in most of the popular maps for KOTH, Control Point, Payload, Attack & Defend, and CTF. Unless it doesn't turn out good or people want something different, map votes begin with voting for the gamemode (of the ones I just listed), and then pick a map from the winning group. Odds are people are going to start wanting specific maps and such more than others, and from there we can change the settings.
These are the maps I currently have on:
Code:
Control Point
~ Badlands
~ Granary
~ Well
~ Gullywash
~ Coldfront
Payload
~ Upward
~ Goldrush
~ Badwater
~ Barn Blitz
~ Thundermountain
Attack & Defend
~ Gravel Pit
~ Dustbowl
~ Gorge
CTF
~ 2Fort
~ Turbine
KOTH
~ Viaduct
~ Harvest
~ Nucleus
Payload (sadly) and Control point have more maps per because they're more popular, with a larger number of popular maps. These are the maps listed for voting - they can be changed any time, so don't worry about it being stuck with or without something. The map voting system can be changed too; random selection, selected based upon previous maps, whatever.