There was one man arrested but released due to lack of evidence. Another man has been arrested and afaik is still in police custody under investigation. There was a new fire that was started by lightning last night, but the main fires which started the whole thing appears to have been deliberately lit by firebugs. Police have assembled a special task force (Phoenix) to investigate this.

Reference.

NSW Premiere Nathan Rees mentioned that NSW has sent some police officers down to assist Task Force Phoenix.

I have only two words for the police: "Get them."