I'm finishing the 5th round of the log cabin. I love to knit this. Now I know why people become so obsessed with log-cabin knitting. It's instant gratifications since you finish each patch relatively quickly (although it takes longer each round) and then you get to choose a new color so it is creative all the way (not just in the beginning).
I'm comming up against one problem. I'm running out of space on my needles. I figure I have perhaps one round left until I have to get longer needles. I'm using 32" circular (80cm) and I have to find longer ones. I saw 40" (100 cm) needles online. Maybe they will do. I don't know how big the blanket is going to end up. I think they have bigger ones. I'll have to find out.