Video - ITN Julian Assange free on bail.
He vowed to ''continue his work and protest his innocence'' after emerging from the High Court to face the world press after nine days behind bars.
But in a series of interviews, Assange suggested that his first 24 hours of freedom would be largely taken up with other legal battles.
Speaking at the East Anglian mansion at which he has been ordered to stay, the Australian indicated that the US is preparing to indict him on espionage charges.
''We have heard from one of my US lawyers, yet to be confirmed, but a serious matter, that there may be a US indictment for espionage for me, coming from a secret US grand jury investigation,'' he said.
''Obviously it is extremely serious, and one of the concerns that we have had since I have been in the UK is whether the extradition proceeding to Sweden is actually an attempt to get me into a jurisdiction which will then make it easier to extradite me to the United States.''
A spokeswoman from the US Department of Justice would only confirm that there is ''an ongoing investigation into the WikiLeaks matter''.