The reversibility of fabric in scarves is a common issue, because after all who has the time and energy to make sure their scarf is always facing RS out? (Well, some of us try, but realistically that doesn't always pan out) Reversible stitch patterns are great for scarves and look good almost any way you toss them on, hence the brawny entourage of ribbed cables. A reversible cable is generally not much different than a regular cable: the principle is the same, with one set of stitches crossing over the other, just imposed over a ground of ribbing instead of stockinette stitch. Each side then features visible columns of knit stitches, effectively "popping" the cable.
That being said, this scarf is much, much simpler to knit than it might first appear -- which is always nice when trying to impress your non-knitting friends, isn't it? Although you will need a larger cable needle than usual, it is more or less regular 2x2 ribbing with a small percentage of rows employing a cable cross (or two). I think ribbed cables of this nature look quite good in almost any gauge -- and although I made mine up in a heavier weight of yarn, a simple waltz with your calculator can easily allow you to adapt this to just about any yarn you want to wrap around your neck.
I'm preparing for some international travel in August -- two weeks on the road overseas generally means about two weeks of planning for proper projects so as to harness the full power of away-from-home knitting time. Then again, since I will be spending time in Shetland (knitter's Mecca!), I'm sure I'll find something to keep my hands busy if the need should arise...