Ok, so get this.
I was bored with the boring ringtones and email tones, and I decided that I need something awesome.
I went on to this website, http://www.research.att.com/~ttsweb/tts/demo.php , and made a custom Text To Speech demo using a girl's voice to say "You have New Emails", "One New Text Message", "High Priority Call Incoming" and "Low Priority Call Incoming". I then took those WAV clips into Audacity, and added a "Beep" sound in the front of each Message Notification, and exported as MP3. I then took a phone ringing and combined it with my Caller ring tones.
Basically, that site rocks. it makes your BB talk to you!! Wow.