this website about strollers. Why on earth it never turned up when I was researching strollers 2 years ago is beyond me, but boy, howdy, am I glad I found it now (testament to the power of Twitter)!
I actually have plans to get a Phil and Ted's double inline stroller, Dash, once baby #2 is on its way (whenever that is). I'll need about 9 months to save for it, but I know that quality comes with a cost, so... whatev. I'll deal.
I saw one in person while Christmas shopping this last winter and was enamored on the spot. The little kid gets to ride in the back and the big kid's in the front! You might think that's the short end of the stick, but if they're little enough to fit back there, they certainly won't care that their view is of the bulging backside of their big brother or sister. And what's so cool about it is that you can buy the single and add the attachment later on.
Anyhoo, for all you moms and moms-to-be out there, you should definitely check out Let's Go Strolling. They have a great variety of ways to look for your stroller: brand, feature, or interest. The only drawback is you can't search by price, but it's not that big of a deal since it's so neatly organized. They even have stroller consultation services! I could've used those a while back.