Gotta agree with Westy. Vocal 6 calls via a WAV file would be GREAT!! I could get my favorite 33rd to do my 6 calls:
Jig: "Ummm..hey dork, you gonna check your 6?"
Crash:"DING!! You going to check your 6 or what?? Gimme a break!"
Arrow:"BRB...on a smoke break. BTW, chk 6."
Nuttz:"WTF DING?? You got a bogie on your 6! You going to break or let him turn you into Philly Cheesesteaks?"
Mayhem (whos been known to have RW problems): "BZZZZT! CRACKLE!!! POP! POP!! BZZZZZZZT"
And finally LanceD: <silence>

In all seriousness...that would be very cool.
-DIng