Are replacement 2G iphones still available?

as far as i know, yes they are. i had mine replaced in april or so. but that may have changed. i'm sure they still are though, for the time being

 

If not and its a warranty replacement they will give you a 3G.

 

yup, they are.
I still see them coming in from repairs

 

I have a 1st gen and been thinking about upgrading. My fear is next year there is going to be a major change to them. I mean how much more can you get a phone to do.

So I am not sure if I should upgrade or not. hear lately the Edge network has been dropping a ton of my calls. If that a slick way for them to force me to upgrade since my contract is up. hehehe