LOVE LOVE LOVE your scarf!
Ive done both dyed roving and spun up wool....like dyeing the wool in roving form. I find you get more versitiliy in color since your going to be stretching it out while drafting/spinning. Ive had the bad experience too of spending a whole bunch of hours spinning undyed wool than dyed it and hated the color (which sucked after all that work)
Love your use of buttons, they are adorable and your color-lot is very nice too