We leverage the power of Views into all our drupal projects - being able to query any and all node content to a page is an essential element of our content management process. And combined with CCK, our queries can be that much more precise (and complicated). Don't even get us started on how our minds blew when we first inserted a View back into a Node via the CCK View Field module. It was beautiful (if only others could understand...).
Here's the only downside: anything having to do with Views and CCK is setup and process intensive. Although it's worth it, OALiquid Layout module definitely falls in the same category, which means effective, helpful documentation is going to take awhile. Screencasts will be a must eventually. Getting this documentation started will help but is guaranteed to be rough for awhile. In the meantime, you'll want to get some experience with Views and CCK and then come looking to implement all the OALiquid sweetness. If not, we can already imagine the hate mail headed our way...