Danny, Ian, and others are pointing to Gregory Williams' MT-Redland. I can't wait until I get home to get it running.

Of course, I couldn't wait. I unpacked it at work and looked around. This replaces MT's MySql data store with triples (by way of Redland).

On the front-end, MT-Redland uses the MT plugin API to incorporate any kind of semantic content into blogging. One of the plugins allows ratings to be associated with an entry using RDF Review. There are also plugins / UIs for adding book, document, and event topics.

Using this app is going to save me a lot of time in incorporating the financial data into blogging!

Thanks!