It's times like these where I wish I played an Artificer...
SHINY THING #1:
Hair tinsel (longer lengths can be found
here) - saw these on someone at InterCon, and my GOODNESS the photos do them no justice. Tied or glued individually to your hair (no clips), all sorts of colors, incredibly SPARKLY when you move. Dude. *grabby hands*
SHINY THING #2:
Glowbys: fiber-optic hair clips. Wore a pair of these to
outlawblade's NYE party and got a TON of comments - very pretty, especially in the dark!
EDIT:
RedLunarMoon makes hair falls with embedded Glowbys already in them, for those so inclined... ;)
*waves hands*