i saw this post yesterday on apartment therapy about la case de cousin paul, a shop in paris that sells these beautiful strings of of lights. the website is really fun! you can create your own strand, pick colors and have them randomly arranged, or just buy a kit with pre-selected colors.
the shortest strand is about 5 feet long, and runs about $25 bucks. the only problem i foresaw was re-wiring the plug, since it is french. but! you can just buy the balls
individually for about a dollar each and i'm sure it would be no problem shoving them on some white christmas lights. if you can't tell, i am really excited about this :) not sure what colors i would choose or where i would even put them, but i WILL have some of these delicious colored-thread ball lights in my home at some point.
go play!