After someone in the "ladies" forum compared me riding my Walmart bike while pregnant to abortion, I thought this message board was probably NOT the place for me, so I happily rode my Walmart bike off into the sunset... I had NO idea this thread would live on forever.
But someone I had emailed the thread to back when it first started alerted me that it did indeed continue to live on, so I thought I'd pop back in and give an update. My Walmart bike is a-okay

I am still alive, my unborn baby is alive and well, and other than the tubes needing more frequent replacement than I anticipated and having a really hard time finding the right size (Walmart doesn't carry them - ha!), I have had no problems with the bike. 2010 was the hottest year ever on record in our state, so I went from riding my bike to work quite often to not very much over the summer and then didn't get back in the habit in the fall. But a big bike shop just opened up within walking distance of my house, so I am actually considering getting a "real" bike now. But for my little less than a mile commute to work and tootling around with the kids, my Walmart bike has turned out to be well worth its $120.