We are pretty prepared for the babies' arrival, except we don't have a stroller yet. It is HARD to find a double stroller that is not the equivalent of the double wide trailer home. So far, the new Vibe stroller by Phil and Teds is the only acceptable model for architectdad and me.
With the additional doubles kit, it is possible to put two 3-month old babies (or once they are able to sit up assisted) in the stroller together. Otherwise, it's just one toddler/one baby or two toddlers. The brushed aluminum frame is lighter and way more attractive than the painted steel of the older models.
Like the Bugaboo strollers, you have the option of purchasing accessories such as footmuff and raincover for the the Vibe. There is even a bassinet attachment if you are using the stroller for just one baby.