I'll be 2U2 as well this spring. Like PP said I am looking at the City Mini double, but I am also considering getting a Graco umbrella stroller (mainly because I won't be going out much with the 2 of them together early on-so my frame and current umbrella strollers would work most of the time).
I will be using our infant seat again. It was the Safety 1st on Board Air 35. It held up very well with DS, was easy to install, and like the Chicco was one of the top pics on Consumer Reports. The only reason I went with it over the Chicco was it got a higher crash test score rating and as a bonus it was assembled in the US (some Safety 1st are made in the US, but not all so be careful). Here is the review on carseatblog.com:
FP has another seat that is mainly a booster I am looking at:
Our table at home is a bartop, so we will probably need to get a new table soon.
One thing I did get for DS was a bigger playyard. It has been a lifesaver so far & if you don't have one I would get one. My mom has the Graco one, but I ended up only being able to find the Delta one & I love it just as much as her Graco. They both have the animals on them & LO loves them. :)
I'm still looking at the other stuff too....so I really can't help you there. Good Luck!!