Does anyone know anything about search capabilities in SharePoint?

What specifically would you like to know?

What the crawler indexes, where it stores the different information it indexes, what it can search, how to tune it, gotchas, or all of the above?

I would like to know if its possible to enter into a search bar in SharePoint a single word from a Multiple Line text field? Also I would like to be able to after entering a search being able to export the results to an excel spreadsheet.

Everything that goes into SharePoint is indexed as seperate items broken apart by spaces or other punctuation-type marks and mapped to a power-word (e.g. filetype, author, etc.).

As for exporting the results. You can subscribe to to them through User Alerts & RSS Feeds but there isn't a way to export the results since SharePoint's philosophy is go there for the most up-to-date results. I googled as well and no one has created a Web Part for this either.