yeah my friends live in Hobart, so that's what they suggested. I'm sure if you stay in the big cities it is not much different, but there was a noticeable difference in Uluruu and Daintree Rainforest. Maybe it wasn't $50, i kind of forget. But yeah, I got mine at the Sydney airport too while I was waiting to catch my flight to TassieI head rumors that Telstra was the best down there. We went with http://www.optus.com.au/ I read that it was the 2nd best, when we went they had a kiosk right in the Airport to make it simple. I think they gave us 5 Gigs for $15 AUD, it was a one off special they had going on. I think normal price was $25 AUD
Optus worked with fast speed and good coverage for all of Sydney, and almost all of Tazmania. Heard that Telstra has maybe one extra tower there they don't share.