suggestions

- better control over time waited until indexing resumes - (I would set it to 2 seconds, not 30).
- save searches
- watch saved searches via RSS: watch a folder for new or changed documents
- list view: provide 1-line-per-found document view, with icons for document type, document name
- allow to group results according to location, file tape, date
- simple date search: last week, last x days, between x and y, etc.