I agree with you (and $1 per GB in AU? Really?) but they are just starting out. Maybe to American/European companies that don't care about the rest of the world, fastly would be ok. :)
That said, you can get much better (and just as fast) deals from EdgeCast and (previously) Cotendo.
Actually, tests from us and several of our customers have shown us significantly faster than Edgecast throughout the US and Europe. (I work at Fastly.)