Some more info about transit visa's in Saudi Arabia.

"It's almost impossible to get a visa, unless you're a Muslim who wants to come for the Hajj or you get a business invitation. One way to get into Saudi Arabia is by transit visa, it's possible to get one in Massawa Eritrea , in order to go by sea to Egypt, first you take the ferry to Jeddah Saudi Arabia and from there to Suez Egypt. Also it's possible to get a transit visa if you want to go from the gulf countries to Jordan."

"Road Transit Visas

These are relatively straightforward. People driving between Jordan and either Yemen or Kuwait are normally given three-day transit visas. These are usually issued only by the embassies in Amman or Sana'a. You are required to go to the embassy with your carnet and a visa for the country at the other end of the trip.

People driving between Bahrain, Qatar or the UAE and Jordan are often given seven-day transit visas.

People driving between Oman and Jordan are required to get the transit visa in Abu Dhabi."

"However, bear in mind that all of this information is unreliable, as it appears to be the Saudi nature that there are no hard and fast rules regarding transit visas. Stories are legion of individuals who obtain visas in their country of origin only to find them invalid at the Saudi border, or who arrive at the Saudi border having been instructed by their local Saudi embassy that this is the appropriate place to source a transit visa, only to be told that only an embassy can issue a transit visa. The basic rule, then, is to double-check all of your facts with your local Saudi embassy and, if possible, with the authorities in Saudi Arabia."

"Persons holding a 3 day transit visa may be hosted by the transporting carrier in a hotel until the departure of their connecting flight."

"Entry and transit is refused to:
1) Holders of Israeli passports or passports valid for Israel and containing a visa, either valid or expired, or any indication that the passenger has been in Israel
2) Persons arriving in an apparent intoxicated state
3) Persons not complying with Saudi Arabian requirements regarding general appearance and behaviour."

"Transit visas for 24 to 48 hours are granted to passengers passing through Saudi Airports. These will be issued only if passengers can prove that they have no option besides stopping at Saudi Arabia en route to their final destination. However passports have to be surrendered at the airport when receiving this visa. Transit visa passengers are not permitted to leave the airport and have to collect their passports from the immigration authorities on their way out."

"Persons with Jewish names may be denied any type of visa."

As you can see, I found plenty of conflicting information. It piques my curiousity though, and makes me want to go all the more.