The most stupid thing would be use two of this tranceiver and 2 arduino with 2 piezo and 2 miniactuator to press the button and communicate with morse
At 30,000 feet heating shouldn't be a problem, in fact it shouldn't be too bad at 100,000 feet provided you use no moving parts, I beleive most ICs and solid state components are operable at somewhere near -50C
What you could do is make a micro sattlite and launch into low orbit,
You could get pictures of the brightest stars with a normal picture.
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via Egeo 16