I want to get input in tabular format spit out via RSS/XML

Question

So I am trying to deploy a solution, that will allow a non-techie to input data into a grid like format (with 6 columns x 8 rows) and get an RSS/XML output.

The idea is to take a document that is updated on a regular basis, say weekly/monthly (like a schedule) and feed it via RSS/XML to an automated web service/app.

Any ideas as what free tools I can use to achieve this?

Thanks much.

[Edit]

The front end should be relatively easy for the 'non-techie' to understand. As close to 'familiar' functionality (e.g. existing office software, or popular tools) as possible.