FYI babysteals.com has a good deal on Blueberry covers this morning. I cannot say enough good things about them. We have been using them on DD not 16 months since she has was 3 months and those things wear like iron and they don't leak or hold smells. We love them!
I should also mention that they don't stain on the leg gusset/elastic, a pet peeve on mine! I love my Thirsties Duos and my GDiaper covers with a prefold, but they just don't hold up in the wash like the Blueberrys do.