Last time I read about IndexTank I noticed that their query language isn't that sophisticated, it could basically find only matches. Did it improve, is it possible to do fuzzy matches?
ADD: also, does it support non-english languages at all?
IndexTank right now supports preffix search, stemming and a basic implementation of a Did You Mean feature. Regarding languages, it supports tokenization for every western language, and not long ago, we added support for CJK too.
ADD: also, does it support non-english languages at all?