This is a great plugin that has enabled rich content on my site from an external data source.
It is extremely powerful and allows you to configure multiple data sources, converting them to XML, and allowing you to format the output using XSLT for your blog.
I found the developer extremely helpful in assisting me with an issue (that I had brought upon myself). This was beyond the call of duty as an optional support subscription is normally required.
If you are not familiar with connecting to MYSQL and using XML/XSLT to transform the data there is plenty of info to be found online, including XData's own comprehensive documentation and video walkthroughs.