I got a BOB Duallie SUS for a steal on Craigslist and was planning to get the infant carseat adapter for walks and then running around 2 months or so (won't want to run with a giant double stroller until I'm strong enough again!) Last time it wasn't warm enough to take peanut out in the BOB until he was almost 4 months old. His neck was always very strong and I stuck to paved paths so I wasn't too worried about him (or the recommendation from BOB to wait until he was 8 months old). This time I'll be itching to run with both of them earlier since it will still be summer. I don't want to push it, though. If #2's not ready to hit the bikepath, I don't want to force the issue. At the same time, I will need to get my runs in!
So, please share your experience and advice so I can start planning my big comeback. Can't wait!