Wow nazo, that sounds really good! And for how long it took to record it, it does so much for the station and the shows! In exchange for 8 seconds of your life, this simple little recording will benefit jphip radio like crazy!
And yeah dude, your friends are right - you do have a great speaking voice. The only thing you have to do now is start believing them, and feel good when you speak on air! Self-confidence is such a huge part of success, and that's something that EVERYONE should know.