Amman: round 2-pin plug (European style). Petra+Aqaba: 3 pin plug (UK style) but not sure about the voltage (phone seemed to be charging for hours longer than normal).
No kettles in any hotel room. Take a bath plug.
Bobble hat and gloves for the desert night - esp if sleeping under the stars.
ATMs or Cash Exchanges everywhere we went (in towns), travellers cheques taken nowhere(!), $ welcome.
Lack of alcohol in most places (except Aqaba) - food and bar bills often have 10% service charge and 16% tax added on top of the price shown - this drops to 10% plus 7% tax in Aqaba ('tax-free zone').
Walking boots recommended for Petra, some places - viewpoints etc - might need a head for heights (but they're not too bad generally).
November holiday = early starts, dark by 5.00pm so antiquities etc close about 4pm.
Desert was cold - November nights, it actually gets even colder first thing in the morning before heating up again. Can be cold in the shade everywhere - take a fleece if you'll be out all day/in the canyons etc, even whilst walking (unless you're Scottish and can handle the cold).
Go. Simply, Go.
Jordan currently has about 10% of the normal level of tourists, which is great for us (not crowded) but no good for the country. Sure, in Aqaba you're 5 mins from Israel and 20 minutes from Saudi by fast camel, have other borders with Syria and Iraq BUT you really wouldn't know it whilst there. Lovely place, nice people no trouble of any kind anywhere, they value tourism and tourists everywhere.
There are people (sometimes bedouins) selling touristy stuff in most places - but all you have to do is say no once, and that's it, they leave you alone - if they bother you in the first place - there are no pushy hawkers anywhere, unlike some other countries. Gifts are more expensive 'inside' Petra (the same items are cheaper outside - even just at the entrance!). Captain Jack Sparrow lookalikes akimbo in Petra (a bit freaky actually!). Cave Bar is nice at Petra.
No problems with the local cuisine or water (used for brushing teeth and I had ice cubes in drinks in Aqaba and Petra) - but bottled water drank during the trip.
Need ~£250 total for the trip for lunch, dinner, tips, nick-nacks etc.
Flip flops/water shoes would be good for the dead sea - salt ridges (some sl. sharp) and stones embedded in the salt are 'foot hazards' so walking carefully into the sea is a good idea.
The early starts were from the first morning - after a delayed flight and late to hotel (1am local time) we were on the road to Jerash about 8am - get some sleep on the plane if you fly in the evening.
I had an excellent holiday with a great bunch of people in a beautiful country.