Why bother doing things, if somebody else has already done a better job than you ever possible could? Right. So here's some links that I have found to soundfiles as well as stuff that people have done with them...
DJ Netgyrl has made some absolutely great Janeway/Seven mixes. I just love them to pieces. So will you. Go!
Stacey has done the same, but without the music. This was actually what I planned to do, but she beat me to the punch. They're pretty cool. Go! (check under Media/Sounds)
If just want plain old Janeway talking (and I can't blame you, who wouldn't want to listen to that voice over and over again...) you can find a ton of soundfiles from various episode at Star Trek in Sound and Vision. Go!