I've a 2 year old son. A lot of comments about sleeplessness and being on call 24/7 stop applying after a few months, when a baby sleeps through the night.

I find I have less time in front of the computer, but more motivation and inspiration while I'm there. I still have plenty of energy and time to create interesting projects (http://yieldthought.com/post/1345897970/10-flaws-that-made-m...). I had more time beforehand, but I can't point to anything worthwhile that I achieved with it.