Yebo (Zulu), Yes (English - just in case you did not know), Ja (Afrikaans, Dutch, German), Oui (French), Ναι (Greek), Sž (Italian, Spanish), Sim (Portuguese), Да (Russian), はい (Japanese)....., but yes in any language still means "YES".
1. Used to indicate agreement.
2. An affirmative response.
3. Used as a mark of attention.
4. Used as a loud exclamation to express jubilation or extreme excitement and pleasure.
5. Used to express consent, etc.
In this case I like #4 and can certainly associate its meaning with my reaction to this fancy female image; "Used as a loud exclamation to express jubilation or extreme excitement and pleasure". I just love it, period.
My best wishes to you and your loved ones for a fabulous 2009.
Well done MF and TFS
Boloria napaea. (56) *