OK, I can't guarantee your own speed, but I cast on less than 24 hours before I took this photo... my one day included working in ends and steam-blocking. (My second one took 10 hours.)
Whether you are looking for quick warmth, colorful gifts, or a not-too boring/not too challenging knit, this is a fun option which takes a little yarn and not much time.
Pattern is now available as Ravelry PDF Download.
First photo used Mirasol Silky wool teal with Silk Garden in pinks and purples.
Second photo used Lavold Baby Llama red with JoJoLand Melody superwash in reds and blues.
Note: Updated PDF file on Nov. 15, 2009 contains only text changes for clarity, there are no errata involved.