DataShaping
That's right, say it with me now... datashaping.
Many thanks go to Kindler Chase for putting me onto this wonderful technology. Datashaping is a function of Microsoft's latest ADO components. It allows you to easily nest information (think nested repeat region). This allows you to present tons of complex information easily.
And instead of trying to teach it all to you here in the blog, here's the list of links that Kindler sent me.
And to get UD or MX (I'd imagine) to work with datashaping, read the datashaping tut:
T-Cubed (nested repeat region using data shaping)