I posted a 71-tap 24ksps runtime-reconfigurable FIR project to the academy section, and as a companion to that there's a video of the thing working. Yes it's horrible german lederhosen-muzak, and yes the sound is out of sync. But, somewhat to my surprise, it works pretty darn well.
It will only live a on the server for a month, so if you want to keep a copy, save it.
Now I just need to think of a suitable application.
edit: http://cc.taur.dk/xvid1.avi for those unfortunate enough to have installed media player 10 and lost the indeo codec.