Did Iran try to dirty bomb Israel last week?

One site is has stronger than average sources, suggesting that an Iranian ship pirated last month was actually filled with radioactive materials destined to be blown up off the coast of Israel. I'll readily agree that the initial post is not sourced well, but worth some prelim thinking for sure:

"On August 21st, 2008, the MV Iran Deyant, 44,458 dead weight bulk carrier was heading towards the Suez Canal. As it was passing the Horn of Africa, about 80 miles southeast of al-Makalla in Yemen, the ship was surrounded by speedboats filled with members of a gang of Somalian pirates who grab suitable commercial ships and hold them and their cargos and crews for ransom. The captain was defenseless against the 40 pirates armed with AK-47s and rocket-propelled grenades blocking his passage. He had little choice other than to turn his ship over to them.

Although American intelligence and government sources are maintaining a strictly observed silence, the same does not apply to the Russians and so it is that we learn the real story of the MV Iran Deyanat. She was an enormous floating dirty bomb, intended to detonate after exiting the Suez Canal at the eastern end of the Mediterranean and in proximity to the coastal cities of Israel. The entire cargo of radioactive sand, obtained by Iran from China (the latter buys desperately needed oil from the former) and sealed in containers which, when the charges on the ship are set off after the crew took to the boats, will be blasted high into the air where prevailing winds will push the highly dangerous and radioactive cloud ashore.

Given the large number of deaths from the questing Somali pirates, it should be obvious that when the contents of the ship’s locked cargo containers finally descended onto the land, the death toll would be enormous. This ship was nothing more nor less than the long-anticipated Iranian attack on Israel. Not the expected rocket attacks (which could be intercepted by the Israelis) but an even more deadly and unexpected attack by sea.. It is very interesting to note that the Israeli government has in the past few weeks, been loudly demanding that the United States establish a naval blockade of Iran."

Is Iran trying to attack Israel? Why now?

• I don't think Iran is too happy that Israel and the western oriented Palestinians are still negotiating. The fanatics are losing power and possible democratic reforms in Palestine could lead to nationhood in the next decade. This isn't good for Iran
• Iran knows that if they shoot a missile toward Israel, they will be rained with missiles and airplane attacks for months by US and Israeli military.
  
• At root, the current regime in Iran is the classic bully. It's time to bloody the bullies nose.