Prime Minister Julia Gillard has met US president Barack Obama for the first time since his re-election at the East Asia Summit in Cambodia's capital Phnom Penh.
The two met at dinner after Mr Obama flew in from Burma, where he became the first serving US president to visit the reclusive state.
Today he is making the first official visit by a US president to Cambodia.
Ms Gillard has welcomed the president's post-election swing through South-East Asia.
"I think it's a great thing for the region that the first international trip President Obama has taken since his re-election is to our region," she said.
Australia is due to sign up to a push for a new trade deal at the summit in Cambodia today.
Ms Gillard will sign up to a regional comprehensive economic partnership (RCEP) with 15 other nations.
She will also be part of an event hosted by Mr Obama for another group of countries working to remove trade barriers, the Trans-Pacific Partnership.
Ms Gillard says both are in Australia's interests.
"These two initiatives we believe are complementary, and Australia will participate in both," she said.
While talking about trade, Ms Gillard has also been spruiking the recent Asian Century white paper.
She said the plan to boost the teaching of Asian languages has already had a warm reception from Indonesia's president Susilo Bambang Yudhoyono.
"He was very - I'm going to use the expression tickled pink - he didn't use the expression tickled pink but he was very, very pleased to see that Bahasa was one of those languages," Ms Gillard said.
Beyond the trade talks, the regional leaders are set to deal with the ongoing tensions between China and its South-East Asian neighbours, who want a legally binding code to deal with disputes.
Human rights record Cambodia's human rights record is also in the spotlight as it hosts the summit.
Amnesty International's Rupert Abbott says the situation has got worse in the past year or two, especially as Cambodians are forced off their land without compensation.
"We've seen an escalation in some of these forced evictions, a crackdown on those who are trying to defend themselves against these forced evictions and those supporting them - NGOs, human rights defenders, speaking up for these communities," he said.
"We've seen their freedom of expression restricted.
"Now whether that's through harassment action, through the compliant Cambodian courts or indeed through increasing violence including killings in some cases, we've seen that get worse." Ms Gillard will not be raising it at this summit, but said Australia does express its concerns to Cambodia.
"We believe a great deal of progress has been made since the days of the Khmer Rouge and all the upheaval, civil upheaval associated with that," she said.
"But we do raise with Cambodia our concerns about human rights in our bilateral relationship, we also raise them through the UN Human Rights Council.
"We believe that more needs to be done, with a focus on extrajudicial killings, land disputes, electoral reform and freedom of speech." Yesterday, Mr Obama became the first serving president to visit Burma.