Voices are terribad. Funny for 5 seconds but had to go back to the old sounds before my ears started bleeding. It might be funny to some old timers here but I think it will scare off any new players that hear that as the default. When you start catering primarily to the in-joke crowd you will ensure that's the only crowd you have left. I'd have made the joke sounds into an optional downloadable folder instead of default.
I'd help with supplying a female voice but 1) I would have an American accent which sort of stands out compared to the brit standard, and 2) it wouldn't be especially sexy. But maybe some of us female players just need to send in all the sound files we can and let someone pick through them for the least obnoxious.