Australia and the US have agreed that Australian detainees at Guantanamo Bay will be tried by US military tribunals. There are a number of points in the agreement, including a promise that the US will not seek the death penalty for any Australians. Also, the media will be allowed to observe the tribunal and the accused may have a cleared attorney as an advisor to his defense team.
The press release makes it really clear that these are case specific assurances which do not apply to Guantanamo Bay detainees in general. Pity.