I have some experience using JSON to pull data from a .asp page.
How would I go about creating my own JSON formatted data source and placing that on a server?
Any other ideas to accomplish this task?
I basically have a spreadsheet of information that I would like to store somewhere and pull that data into an iOS app.
Well you can use any language. For my apps we use a PHP Webservice. There are numerous tutorials out there about how to create a JSON WebService that you host on your webserver and your mobile app communicates with.
Here is a VERY basic xml / json service that uses php and mysql. This should get you pointed in the right direction.