If your IT skill sets are in demand and you are good and knowledgeable with your skill sets, or you can pick up and master new skills without too much pain... and you have the capability to be personable and social and you can also get up in front of a small group and speak, then perhaps you might want to look into becoming a contract trainer.
I worked as a trainer in this fashion from '99 to '05 and it was a great experience. Generally it involves traveling to a client's site or training facility to do the work, but if you live in a big city, it will reduce the probability that you have to travel depending on the organization you do work with. The pay is pretty good... you can bring in between $400 to $1000 a day or more depending on various factors such as content complexity, demand, and class size. Most IT classes seem to run for about 3 to 5 days.
It is part time work in the sense that you train only when classes are available to be taught, and when you feel like teaching them. (Though turning down requests for training will move you to the bottom of the 'available trainers' list with most companies) So you could easily work 26 weeks during the year and realistically bring in a $75,000 salary. That gives you the other 26 weeks of the year to learn new skills and brush up on old ones, and to basically do whatever you want to with your free time.
On the downside, unless you are always learning the next new "hot" thing, it can be difficult to find work... Especially now that the economy sucks, as training budgets typically are the first to get slashed.
But if you find the right niche, you have partial control over the times and places you work. Also, you typically don't work during the weeks where there are holidays. And usually, a training day is exactly 8 hours, which includes a 1 hour lunch break and other smaller breaks in between. You typically won't work more than that unless the materials are new to you, where you have to spend an hour or two per night reviewing what's to come the next day.
As a bonus, if you can write your own materials, you can also make an additional income. Course materials sometimes go for anywhere from $10 to $75 per student per day.
Granted, training is not for everyone, and this is probably the worst time to consider starting off in the field... wait for the markets to go up... but it's an awesome part time gig!