Heya!
I just whipped this up using Twilio.. call or text (anything to) 310-570-2646 (310-570-COIN) and it'll give you the last Bitcoin-USD price on MtGox!
(The price updates every minute.)
Fun fun fun.
That's it!
josh!
It's all fun and games until you get a $99999 bill from sending and receiving text messages.