I use LCDSmartie mainly for winamp details (love the spectrum )
and secondly for internet newsfeed.
I love the spectrum analyser too. It's what kept me using winamp over other media players.
When winamp's not running, I show the date and time and number of emails I have.
All still work in progress... but
on server, it shows all temps for raid hds, shows free space, shows cpu usage, emule stats
on htpc, mediaportal stuff, temps (when playing game), and spectrum analyser for music.
htpc vfd is getting replaced with imon lcd... not sure what to do with that yet.