if you have installed dev tools, there's SetFile in /developer/tools
you can hide things you don't want to see with this.
SetFile -a V whateveryouwanttohide
should do it.
If you have some partitions, there's probably "temporary items" and "desktop folder" in each one...and afaik, there's no use for them. It's not a big deal, but if you find them annoying, you can hide them, too... or just trash them... I think some of them came back for whatever the reason... or I forgot to delete one or two... so I just d hide them all now...
in any case, this "SetFile" (you might want to add alias for it... with all lower case) was covered in some other thread...