I need a simple database plugin…

Let me explain what I am looking to do…

I am developing a sidebar widget that will pull some meta info from a post/page and display it in a formatted fashion (kinda a dynamic text widget).

My problem, I realized, is if I want to change what 40 posts have in their meta, then I have to manually edit each post…

What I want, therefore, is a way to create a table in WP that will store specific variables (tag, image, title, content, link). Then, in the custom field of the post, all I need to do is specify the tag. Then, the widget will pull that key, match it to the table, get the other fields, and display it in the widget.

The admin interface would be simply listing all the rows in a formatted way with the ability to add, delete, and update existing rows. They will all be text input, as the widget will parse the data in a formatted way.

Can someone point me in the direction of an existing plugin or someone who can throw it together really quick?

Thanks!!!