I have been nursing for almost four years, and yes, still going at it. I'm a proud tandem breastfeeder. =) In fairness, I am proud to have nourished my kids for a long time!
Yes, I have been receiving second looks in malls -- from people not admiring my breasts, mind you, when I breastfeed my little ones. Rather than stare right back at each and every person, I just smile and coo at my little ones.
Tandem nursing is a choice. My OB asked me to stop nursing when I became pregnant with my second little one, however, I CHOSE not to. I have read books and asked around, that tandem nursing is possible. I did not regret it.
Bottoms up little ones.