I want to use OpenStreetMap data for an ArcEngine application I'm working on, and I need the data to be stored locally. I don't want to download the entire planet.osm file, but rather by state, county, region, etc. Are there any resources where I can download OSM data by geographical region?
Portions of OSM data consisting of a specific geographic area are called Extracts.
If you want something more specific like a county or a municipal boundary), you can download the appropriate state extract and then use a tool like osmosis to filter out all data within a specific area to create your own 'extract'.