As vengeful said, I'm just east of Toronto... my truck is pretty much rust free.
I had that same issue with the window molding on the back bubbling, I even had them replaced fall 2004 when I played smash up derby with the truck, and theyre starting up again. I dont know how much they are to replace, as it was worked in with the rest of the body work, but I do know it's not cheap.
My wiper arms are not rusty, but the paint has flaked off, so theyre black & silver... now... look pretty dumb, but Ive been too lazy to pull them off & repaint them.
When I bought the truck - June 04 - it had a few little rust bubbles here and there, but they could have been started by stone chips or the like, I really dont know, but I had those fixed as part of the contract to buy the truck...
Right now it has some cancer on my PS front fender, right at the top of the wheel well, I noticed it has started to bubble... this might be a flaw on part of the body shop that fixed my truck, as that fender was fixed (not sure if it was replaced) and repainted. I dont care much about it now, as it's the one I mutilated @ the NorEaster, so it will be replaced soon enough.
olimess, where abouts are you?
if youre close to Brampton, I would suggest checking out Brampton North Nissan, they're an amazing dealership... many of the members on www.nissantruckclub.com (club based out of southern ontario - mostly Xterra owners) use that dealership. I found my baby there