Enso: Quicksilver for Windows? (An application launcher and more)

Update: I have replaced dead pages with Internet Archive links to help fight linkrot.

Most Mac users seem to know and love Quicksilver, that wonderful little application launcher from Blacktree (and much more, as LifeHacker often points out).

Those of you stuck in the Windows world (or at least sometimes) may finally have an alternative: Enso. The makers of Enso put a lot of thought into their product (and say it's not just a rip-off of Quicksilver). However, Enso, unlike Quicksilver, is not free; it will run you $19.95 after your 30-day trial. You can download Enso here.