“For savvy legal researchers who have access to Westlaw or LexisNexis, or know their way around a law library, PreCYdent offers something that can supplement their research needs.”
Also includes some Web 2.0 features like tagging and case ranking.
I found this comment to be particularly intriguing: “[Thomas A.] Smith is not just indexing; he is describing a natural order. ‘Thus, we view ourselves as being more true to the underlying organic structures of law than the indexers are, and certainly more true than (mere) textual searching is.’”