The Bugaboo clone, UPPAbaby will be offering a rumble seat to convert the Vista stroller into a twin stroller in the next few weeks. The rumble seat mounts onto the frame of the 2009 Vista. (If you have an earlier Vista you can send it into UPPAbaby and for $60 they will modify the frame, and for $250 you can purchase a 2009 frame.)

The rumble seat can be used in conjunction with a car seat. And the main seat can be used in the forward or backward position, and can even be fully reclined. And unlike the Phil & Teds Vibe the seat face toward the parent and is higher on the frame so there is less danger of little fingers being stuck in the wheels.

The rumble seat will hold a child up to 35 pounds in addition to the 50 pound weight limit of the main stroller seat.

The Vista stroller costs $669 and the rumble seat costs $129.95. And for an additional $90 you can buy what UPPAbaby is calling the Piggyback (a toddler board) for a third child.

It is starting to look like the clones are making all the innovations these days, Bugaboo is really going to need to come out with a twin stroller sooner or later. More pictures below.