There will be times (mostly when traveling) when a second, smaller, and more-lightweight stroller will be called for. (Sigh) Yes, we said a second stroller. But check out the gb Pockit+ Lightweight Baby Stroller. The thing weighs all of 9.5 pounds and folds up in two steps like your very own Transformer (not the Michael Bay movie kind though). Plus it'll fit in your carry-on so you'll always be ready to, in the words of Optimus Prime, "Transform and roll out!"
Promising Review: "This little fella survived a three week, high-impact adventure through bumpy, crowded streets of Istanbul and semi-paved, beachy world of Paros Greece. It performed like a champ! It flexes more than conventional strollers which felt weird at first, but we quickly got used to that. It took a few tries to learn the break-down procedure ... wish we'd practiced at home before needing to do it in a crowded, cranky, pre-dawn security scanning queue. When necessary, we carried it around in a medium-sized messenger bag which was just big enough to contain it." —Michael & Laura
Get it from Amazon starting a $160 (available in seven colors).