I made this a few months ago out of Lion Brand Cotton Ease, and it is a really easy, really fast knit. I was scared of the fair isle at first, but even that went relatively smoothly after I learned how to knit Continental. I just followed the instructions in my Stitch 'n' Bitch book and the Amy's videos and it worked like a charm.
Never did learn how to purl Continental though. Oh well.
I, too, love the Tomato sweater pattern. I have never knitted fair isle either but would like to learn. I would be interested in doing a kal on this one if it were a little later in the summer. Right now I am trying to finish up my Bonne Marie Burns waist-coat. It's such a neat pattern. It's her latest and it's called Nicole. I am also working on a shrug using a Drops pattern. Anyway, I saw the Tomato pattern the other day and I loved it.