When the time comes let me know
I know that the time is not up yet for thinking about advertisement. However, I do have a few ideas as far as to generate quite a bit of capitol from the support of your loyal players which would be greatly useful when it comes time for your advertisement campaign. I know that the most cost effective method is to give exclusive beta wrights to a hosting company such as Filefront / Fileplanet in which you can get a few days 1/8-1/10 banner rotation free. However in order to hit other markets which don't only appeal to file hosting companies such as gaming review websites and listing websites. I have a few connections with Ziff Davis (1up,filefront,ign,etc), Blind Ferret (Ctrl+alt+del,explosm,lfg,etc), MMORPG.com (I am aware that NS2 is not a MMORPG but surveys show 8/10 mmorpg players also play FPS/RTS as well.), and many others. Since I currently do business with them under the company I work for I am more than willing to help with NS2 on my non office times to help get NS2 out there and get as many players as possible.
Companies such as those do not do cross advertisement usually unless its an exclusive to them or there is some event which draws their users to you as well as making their viewers glad that they use their website services. Which in the negotiation process is pretty hard to do unless your giving away computers / video cards / or something of that nature. Which usually costs more than the CPM or CPC that you would pay for normal banner rotation fees for that time period.
What I want to help with is gathering capitol over this developmental time which is basically funded by your supporters at no cost to them but supplies you with a nice chunk of change you can use to put out a decent advertisement campaign with little or no cost at all. Thus my post is to inform you that even though there is no time put into advertisement currently, you can still do things to prepare for it so that it is of low/no cost to you.
Just my 2 cents and attempt to help. I owe you guys big time. Believe it or not I met my wife through NS. I moved from Hawaii to California to meet her and we hit it off. Happily married now for 3 years.