I just finished a cabled afghan as a surprise Christmas present for a friend. I started it in September and finished it a few days ago.
Here are some of the details.
Pattern: Cable Comfort Throw by Lion Brand Yarn
Yarn: Red Heart Super Saver – Ranch Red
Needles: 10 1/2 circular (I don't know the exact length)
Modifications: I wanted a bigger size, so I cast on to make 6 of the cable panels and did 16 repeats of the pattern. Since I didn't have a bulky weight yarn I doubled up the worsted weight.
All in all it was a pretty easy knit. I definitely will keep this in mind if I get any more requests for a cabled afghan.