For starters may I first state, this is NOT a scam. We're all aware of the masses of scams going off in eve and its only right for you to feel a little skeptical, however, I don't ask or want you to part with a single ISK until you are sitting, chatting away on your new Teamspeak 3 server. So hopefully I can put your mind at ease.
You are here because you wish to purchase a Teamspeak 3 Server slot for your Corporation/Alliance and you don't wish to pay the silly prices hosts charge for the service. You want to pay in Eve Online ISK.
I was in the same position as you; i started a corporation, i built up a members base, i got the ball moving and things were going well and we started running fleet ops with in game voice coms. Like me, you probably realised that this wasn't really a great solution and so you looked in to purchasing a Teamspeak/mumble/ventrillo server. And once again, most probably, like me, you were shocked at the ridiculous prices people charge for only a few users.
"25 Users for $10 a month??? I have 40 members!"
Well this madness brought me to the conclusion that I wasn't going to pay. Instead I got licensing from TeamSpeak directly, (yes, I have full licensing to run my servers!) and created my own. Now my corporation happily chats away on teamspeak 3. Morale of my corporation raised very fast as it always does with voice coms. People quickly become friends.