I recently recorded a voice demo for myself which I've posted onto SheezyArt over here: http://www.sheezyart.com/view/1905574/
In it I demonstrate a bunch of character voices, all of them me (including the sound effects) without using any fancy voice effects beyond the noises made by my own throat.
I love doing voice overs. In the Edd Egg cartoons I've done nearly 30 or so voices so far. So if anyone out there is looking for a voice over, even if it's for "Soldier Number 2", I'd love to voice over for anything. Naturally I prefer humour/toony animations, but hell I'm game for anything (oo-er!). Just give me a PM or something.
And on the subject of Edd Egg, the Halloween special is in the works which I hope to release in the next couple of weeks. I'll be entering it in the Newgrounds Halloween 2008 compo, where I'd hope to second. Why second you ask? How on Earth can anyone else be first place with this great entry from HotDiggedyDemon: http://www.newgrounds.com/portal/view/
EDIT: Yes, I'm free of charge. Just credit for my work is all I ask for!