Congratulations!!
We ended up with four swings - two upstairs and two downstairs. Running upstairs is more complicated with twins (think two trips up and down if you are alone), and I was less inclined to do it with two other kids to care for. We had a full-size co-sleeper and the girls were too big to share it long before they hit the weight limit. They didn't do that great sleeping together (tended to wake each other) so we were all happier when they finally moved into their own separate cribs.
We had two bouncy seats but they didn't really like them (my first two didn't either). Two high chairs that reclined were important early on - that was our ticket to a peaceful family meal starting around 4mo. The babies weren't on solids yet, but they were happy if they could see all of us, so we stuck them in the reclined high chair when we had dinner.
With my first two, it wasn't a big deal to run upstairs to change a baby. But with twins, you really need a changing station on each floor (or each main area of the house).
Do you plan to nurse? Nursing is much more complicated with twins - not only do you have two babies who need to know what to do, but it is pretty common for twins to be at least a little early (docs around here won't let us go past 38 weeks) and even a 37 weeker can have minor feeding/sucking issues. I successfully breastfed my first two but ended up EPing for the girls (born at 37w5d at 7lbs and 7lbs, 3oz).
Yes, you need two infant seats and a double snap n go. Join your local multiples club to get early access to their resale (most bigger groups have 2 resales a year, it seems) and save money on the snap n go.
Diaper-bag wise, I survived about 9 months with the Skip Hop Dash, but always carried a separate bottle cooler with filled bottles.
I need to sign off and go get a crying baby - hopefully others will chime in, but read through this board also as I know others have asked the same question before!
Single mom to
DS ("twice exceptional") - September 2002
DS - February 2006
DD - July 2009
DD - July 2009