The UN's World Food Programme says it has got permission from Burma to send a plane carrying relief from Bangladesh for the victims of the cyclone.
Two planes carrying aid supplies organised by Bangladesh's army have already been sent.
The UN says it is disappointed at the slow progress made in securing access to victims of the cyclone.
It says about 23,000 people have died in the storm and tidal surge and 1.5 million are at risk.
Burmese state media say 22,980 people were killed by Cyclone Nargis but there are fears the figure could rise to 100,000.
While flights from Western agencies have been held up, however, Burma's regional neighbours, including India and Thailand, have already flown in aid.
The World Food Programme has sent one shipment of high energy biscuits to Rangoon and has received clearance for a second larger one.
In all it says it will send half a million packets of the biscuits to Burma.
http://news.bbc.co.uk/2/hi/asia-pacific/7391550.stmAnd, this is just pathetic and outrageous:
Burma wants supplies but not foreign aid workers, its foreign ministry says, hours after the UN chief urged military leaders to prioritise relief work.
Burma was "making strenuous efforts" to get aid to affected areas by itself and was not ready for foreign teams, a statement in a state daily said.
It would accept cash or emergency aid, it said, but not international teams.
"Currently Myanmar (Burma) has prioritised receiving emergency relief provisions and is making strenuous efforts to transport those provisions without delay by its own labours to the affected areas," it said.
"As such, Myanmar is not ready to receive search and rescue teams as well as media teams from foreign countries."
An aid team and journalists who arrived on a flight from Qatar had been deported, it said. http://news.bbc.co.uk/2/hi/asia-pacific/7391535.stm