No problem. Great site. I always welcome better search technologies.

In regards to the filtering I think allowing the user to do a bunch of cross-filters would be of immense value. Factors like type of website, author, creation/update date, etc. help bring the results down to another level of granularity.

This won't be useful for all searches, but would really help optimize certain types of queries (e.g. seeking an answer to a specific problem).

I often restrict searches by date on Google but rarely use the other options. It might be nice to have a refinement by focus of the site - is it a site mainly on the topic I'm searching for or is it a general site.