Maybe a little unnecessary, but still gotta admit it's cool:
Aloud - a new jailbreak tweak which makes notifications speak! (no music) - YouTube
Aloud - a new jailbreak tweak which makes notifications speak! (no music) - YouTube
Definitely cool--I actually bought it knowing full well I'll probably almost never use it; I just wanted to support the dev who put the work into it!
Honestly sounds annoying to me.