Hi,
I know how your wife must feel. I felt the same way when I was on maternity leave for a year and the worst part was at the time we were living in a condo so that made it so much worse.
Thankfully, we bought a house last spring and my son is now 19 months so I can take him in the backyard, to the park, etc.
To specifically answer your question there is a website that may/or may not be of help to you. I am not familiar with where you live. I live in Toronto, Ontario. Anyway the website is:
www.HelpWeveGotKids.com.
They also have a book for the Greater Toronto Area and I found a few playcentres to take my son to.
Also, check out your local libraries and churches and schools. Many offer free programs to mommies and tots. I just signed me and my son up for Toddler Time at our local library. It's a half hour every Monday and the best part is it's free.
Good luck!!