I am asked in my travels where I get the relevant & real-time data for mash-ups from multiple sources …
Happy to share that info …. I get much of it from data.gov and you can too.
Check it out @ http://data.gov
“Here you will find data, tools, and resources to conduct research, develop web and mobile applications, design data visualizations, and more.”
Data.gov lets you search more than 85,000 datasets with topics ranging from agriculture to finance to public safety and everything in between. The site also features a blog for posting updates on available datasets and a section for cities to participate in sharing their data.