2007 will be, almost certainly, the year we see the next Federal Election.
According to [the timetable published by the AEC](http://aec.gov.au/_content/When/elections/faq_elections.htm) the election has to occur between 4 August 2007 and 19 January 2008. A double dissolution can occur any time, but those are the only dates that avoid a half-senate election too, something we can be pretty certain no one wants to see[^1].
There’s never been an election in January, so we can safely rule it out. Since 1950 there’ve been none in August or September, 4 in October, 4 in November and 5 in December (none later than 13 December). So we’re now down to 10 possible dates. My guess would be that the PM might call an election shortly after APEC ends on September 9. The minimum time between issue of writs and the election is 33 days, which would put the election on October 13 or 20, probably more likely the 20th, which would require the PM to call the election by Monday 17 September.
[^1]: The last half-senate election was held in 1970, and resulted in severe losses for the Government of the time.