Benjamin Netanyahu appeared on NBC's "Meet The Press" and basically said that Iran was in the "Red Zone" regarding it's nuclear weapons program and very close to requiring a military response from Israel before it becomes to late. The full interview with David Gregory is below.
As an aside, I would note that there is a new moon on October 15th, and that conditions will be favorable for an attack for two or three nights on either side of that date.
The US, UK and allied Navies have been increasing their forces in the region and we have two carriers in the region (possibly a third if the Enterprise tarries and a fourth if the Truman (which is currently at Norfolk and listed as 'surge-ready' should it be needed.
In my estimation, if the Israeli government sees an Obama victory as likely in November, they will act. If they think Romney is likely to win, they may hold off, knowing that his administration would be favorable toward increasing pressure on Iran to halt it's nuclear weapons program.