Well, we have a new addition to our "back room" that recently turned it into one giant playpen! We got a baby gate with a swinging door (gotta love Craigslist!) and put it at the base of the brick steps that lead into the back room. The room is carpeted and spacious enough for plenty of crawling! The only "non-baby-proof" area of the room is the computer corner, which is filled with all kinds of cords and wires.
But, we've recently begun some intensive "no!" training...and, with a tentative reach coupled with a permission-seeking glance over her shoulder to Mommy or Daddy, Elizabeth has demonstrated that she is already starting to "get it"--even if she doesn't always obey it!