Rob has posted part 1 of a series on mining unstructured data. He goes through some basics on ETL (Extraction, Transformation, Loading) and natural language parsing, implements a text miner using LinqToSql, and analyses the results. For the next part we are promised some data warehousing tricks, more analysis techniques, and some OLAP with Excel. It has been an interesting read for me as I am pretty unfamiliar with this area of IT.