I have this requirement, and so it seems to others on the LS forums.
I have no server and need to distribute information to Adobe Reader users of a form. The information benefits from some manipulation (sorting), and may be updated frequently. One easy way to maintain the data is using XL. When the data needs to be sent to the user community its simple to attach it to an email.
My form, created with LS uses this variable information as a 'database' to populate default values into the form, think names, addresses, and phones. The Reader user doesn't update the database, though they could by using XL.
Today I can't tie the form to the XL data easily. While I appreciate the security issues I'd request some completely 'local' solution to an LS data connection, one that could run on a single PC.