GOOGLE FUSION TABLES
250 MB storage limit per user account, 1 million characters per cell
upload limits—1 MB per spreadsheet, 100 MB per .csv or kml
To get more space, you have to have and work through the Maps API Premier account
Purchase more storage space for Fusion Tables: Google Groups Thread
How to query from google fusion table: Google Dev Guide
CLOUD MINE
Get data storage, user accounts and server-side code with Cloud Mine
FILES ON OUR OWN SERVER
Instructions for parsing data from a .gpx file into processing
