I've been sitting here making the knit booties and it occurred to me that a similar design could be done in crochet. It wouldn't look like the knit ones, of course, but the design would be basically the same-start at the sole, decrease in the instep to form the bootie and then crochet on a ribbed top. Best thing about it will be that, once done, it can be crocheted together using slip stitch.
Anyway, when I get yarn and hook together I'll write it down and put it in my pattern blog so it can be shared. I always like to have crochet versions of knit projects so that my friends who don't knit can have a pattern too.