I very much like FAST because of 2 reasons: 1.) When posting a new page onto my website it is just a matter of some days until it's in the FAST index (in google I sometimes have to wait for weeks) 2.) For some specific topics I very often have position #1 or at least #2 in the FAST ranking.
I accidently came to know PepeSearch [pepesearch.com] and was happy to see my page at #1 when looking for my standard keywords. Indeed PepeSearch is "powered by FAST".
Does anybody know which other SE's or portals are using the FAST index?