My oldest daughter did the same thing - about 2 wks before she would turn 10 mos, she took a few steps. For the next week or so, she would take two or three steps here or there, mostly to get to a short-distance where there wasn't anything convenient to hold on to. Then she gave up - completely stopped. Would cruise, would crawl, but would not walk. She officially began walking a little over a month later, about two weeks before she was 1 year old.
Since then, I have realized a pattern of behavior when she (who is 3.5 now) wants to do something new. She will try it, but when it is harder than she thinks it should be, she backs away from it and picks it up again a while down the road. It's just her personality - everything from drawing to riding a bike, even food.
Now, having another child (11mos) who learned to walk at 9.5 mos so that she could chase her older sister, I find the little one's abilities more disconcerting. She is virtually fearless - walks, climbs, everything, with no sense of danger, or clear understanding of the word "no". Though I'm proud of her perseverance, in comparison to the two, it would do my heart a bit better if she could take on just a hint of her older sister's personality.
Take advantage of these non-walking days :) Your son will be walking before you know it!!!!!!!