Also, I personally have a membership to FlexJobs. It's $14.95 a month, but you get access to carefully curated, guaranteed scam-free work from home job leads. It's not for everyone, but I've overall been impressed with the site. It may be worth signing up for a month just to see if you think it will benefit you in your job search. Canceling is very easy if you don't think it's for you.
But once you’re in your home office—alone, every day—you might start to miss that collegial camaraderie. Since the UPS incident, I’ve reached out more to colleagues via IM and will post cute pics of my new puppy for my colleagues to see on Yammer. And when we’re on deadline, we even (gasp!) talk on the phone. It’s helped tremendously to make the disconnect not feel so severe. It’s a good balance between having peace and quiet when you need it and much-needed interaction with others, too.