Day 75 of 100 Search Engines in 100 Days - PreviewSeek

PreviewSeek is a solid search engine that offers quite a few search usability features, such as search clustering, Web site previews, and search refinements. However, I found that PreviewSeek has some definite issues it needs to work on.

Related: Don't forget to check out the rest of the search engines profiled in the 100 Search Engines in 100 Days Table of Contents.