I've got an original iPhone that I'm trying to find a case for online and searching is quite difficult. What's the accepted shorthand? I've seen 2G (which seems wrong, as that would mean 2nd Generation, which would be the iPhone 3G), and 1G, neither of which seem to yield good results.
The terms 2G, 3G and 4G refer to the x'th generation of a cellular wireless standard.
Therefore, you can search for cases that refer to the iPhone 2G. If you want to be abosultely sure, use the model identifier number when searching: A1203.
Terms used for the first iPhone include:
Here's an overview of celluar standards from Wikipedia: