Hi,
Quite a lot of questions there! Well, I will answer the best I can.
As Canon's new frontline prosumer digital SLR, it should come with one battery and a charger, but no AC adapter cord. That is separate and quite expensive! I got mine for the 10D and it was well over $60. I would reccomend you get another battery for any trip away from indoors. In fact, even if you are not a serious photographer, I think you should always have more than one battery at all times.
I can't speak for outlet adapters, but I am sure they are out there. I never went to any other country except Canada back in 1993.
For memory storage, in a 2 week trip to another country, you will be tempted to shoot at anything. In that case, you will need a LOT of storage. Since the 20D is a 8.2 Megapixel camera, you will have to be serious. If willing, you can set the image quality to as low as possible and you can shoot more pictures but you may not be able to produce large quality prints. I would say set your image quality to small or else, get more storage. I don't think you can get away with 1GB shooting 8.2 megapixel sizes unless you can manage your way around like bring a laptop and get an adapter for it.
I can't speak for the iPod w/ Dock Connector since I don't have one.
I don't know insurance for equipment. I never tried one if there are any. But don't depend on the warranty, in fact, you might as well throw away the warranty. If you read the conditions on the back of every warranty card in detail, they would pretty much say that they won't cover any damages that would most likely happen.
As for bag, first know how much you expect to carry. A 20D body and a lens along with cards and batteries would not demand a big bag. Take a look at some bags out there some are designed for simple walk around with one camera. Others are for more serous photographers carrying multiple lenses and flash lamps. The two biggest camera bag brands are lowerpro and tamrac. I currently have a Tamrac, but I carry two cameras, three lenses and one flash, so it is pretty big.
http://www.lowepro.com/
http://www.tamrac.com/
At the same time, you can check out this popular article about the 20D. I am sure it would say more about the camera than I can.
http://www.dpreview.com/articles/canoneos20d/
Well, thats all I can say for now. Any other questions, feel free to ask.
Thats one of the things that Pbase is all about!
Hugh