The Force.com Cloud Converter is a kick start to:

inspect a JDBC/ODBC data source's meta data reproduce an object using the Force.com metadata API migrate your data

The Force.com Cloud Converter is produced by Model Metrics Inc. Anyone is welcome to use and contribute. Works with any Salesforce.com instance with API / metadata API access.

You can learn about using Cloud Converter for free on the Salesforce.com AppExchange.

Video #1: How to convert a database to Salesforce.com.

Video #2: How to convert a spreadsheet to Force.com.

Learn more on the Model Metrics blog.