Christina - glad to hear your DH is doing better and has some meds, and it's good that some family was able to come by and help out! My DH has had high blood pressure since he was 24, but luckily no other problems associated with it so far. His oldest brother had complete kidney failure at age 30 due to untreated hbp, so we are lucky DH's was caught early and controlled with meds.
Meredith - that sounds like a good plan with the naps
Stacy - wow, another young heart attack! It's good that your DH is doing better with his meds.
Maggimus - I would give almost the exact same stroller advice as Kelly, some combination of an infant seat and stroller frame for the first 6-12 months (however long the kid fits in the infant seat), followed by a better stroller for when the baby is a little older. The stroller frames are so cheap and convenient that it was worth it to me. The biggest advantage of this combo is that when the baby falls asleep in the carrier (as they often will), you don't have to take them out of the seat to bring them in and out of the house, stores, etc. And we all know that a sleeping baby is a happy baby.
We originally bought the Graco Snugride infant carseat:
http://www.toysrus.com/product/index.jsp?productId=3330193 and the Snap n Go stroller (same as Kelly posted). The Snap n Go stroller is super-light, easy to fold, and has a really big basket. I was very happy with this combo. The Chicco keyfit is a bit smaller than the snugride, but I had no problem fitting the Snugride in my Honda Civic.

It's also quite a bit cheaper. Not that that should always be the deciding factor, but it is often a big concern.
For a light weight stroller, we first bought the Combi Cosmo Ex, similar to this one:
http://www.toysrus.com/product/index.jsp?productId=3375006, but I didn't like it for long. For one thing, the basket is almost useless. It is hard to access because there is a bar in the way, and if you can manage to get something in it, it either drags on the ground or against the back wheels. Also, I am only 5'2", but my feet were constantly kicking the wheels as I walked, and it got very hard to push the bigger my son got.
So around the time he turned one, we went for the Peg Perego Aria OH, similar to this one,
http://www.toysrus.com/product/index.jsp?productId=3417039. I was deciding between this one and the Pliko P3, but found an unbelievable deal on the prior year Aria that I could not pass up, so that was how the decision was made. So far we love it, especially the "freedom of movement" straps and the huge basket. It doesn't fold up quite as small as the Pliko, but other than that, I can't think of a single complaint.
My SIL has a son the same age as mine, and they got an Evenflo travel system, similar to this:
http://www.toysrus.com/product/index.jsp?productId=3069587 and she absolutely hated it. I don't think there was anything she liked about it except maybe the large basket. The infant carrier was heavy and hard to use, the stroller was even heavier, did not fold up small or easily, and it was not easy to push. As soon as her son could sit up on his own, she got a cheapo umbrella stroller (under $20) instead.
There are quite a few moms on this thread that are stroller obsessed and have bought a lot more strollers (you all know who you are!

) and can probably offer a lot more opinions.