Ok, I know everybody and her sister has knit a Citron by now, but I just finished mine (including weaving in the billion ends that came from using this colour-changing yarn - not that I am complaining as I think the end result is totally worth it).
I wasn't sure how I would feel about the finished product since I am usually WAY more excited about the prospect of knitting something as well as the process of knitting it, but I wore it today to a meeting and while no one else commented on it, every time I saw it on myself (mostly in the bathroom mirror, but whatever) I was pretty impressed. The colours are spectacular.
Pattern: Citron, by Hilary Smith Callis from Knitty: Winter 2009
Yarn: Wolle's Yarn Creations, 6 ply color-changing yarn, cotton, in Aqua Frog colour-way
Notes: I did 6 repeats of the pattern, and bound off knit-wise on a purl-row because I was trying to make sure that the edge would be in all six strands of the brightest blue. I ran out of yarn about 40 stitches from the end (you have over 500 stitches on that final row - it's hard to gauge how much yarn you need, but you ALWAYS need more than you have, non?). So I went to plan B: crochet cast off for the final 40 stitches, and to be honest, only Angie will be able to tell...
I was a bit hesitant about using this yarn since it is a slightly heavier weight than the pattern called for, doesn't have a sheen, it's a bit splitty since it's not plied together, and there are all those ends to weave in at the end -- but I would highly recommend this yarn for this project (2 skeins are required). I knit mine on 4.0 mm needles.
In the end, I am so pleased with the final result. It's a fun pattern to knit, and knits up quite quickly so you have the added bonus of near-instant gratification.