I found an organizer at Michaels. It comes with 50 bobbins and it only cost something insane, like $2.79. I spent Saturday morning winding, winding, winding the floss. I thought "This isn't going to take long." 4 hours later, I thought, "WTF, why did this take so long?" I don't know, but it's easy to do while catching up on episodes of The Colbert Report on Hulu. Here's my finished FlossBox:
Pretty! Now I can easily pick and choose colors for embroidery and cross-stitch.