Have you read Baby Bargains (author Fields) yet? Lots of great tips for saving money on all the products out there. Plus, reviews of baby products so if you're going to spend a lot, you buy the right stuff. You'll feel like a truly educated consumer.
I agree with the PP's that babies really arent's that expensive per se. For me, because I work, child care is a FORTUNE. I spend $1300 per month to school a 2 and 4 year old 3 days a week. That cost varies by area obviously. #3 is going to put me at $2000 per month, but only until the 2 year old can go to parochial school with her sister.
I don't ever like to spend more money than I have to, so here are some of my tips: yard sales and consignment shops for clothes and toys, as mentioned above. keep an eye on the toys and equipment for recalls; i saw my local Once Upon a CHild selling a totally recalled highchair. Also, keep an eye out for quality and stick to the good brands, like Gap, Lauren, European brands, LandsEnd, Hanna ANdersson. Old Navy and Target are great for 'disposable' clothes like tee shirts, tights, underwear, etc. Even if you know the gender of your baby, buy unisex in case you have another, especially on coats, jackets, sleepwear.
go Target/WalMart brand as much as you can: mylicon drops, sudafed, benadryl, ibuprofen, etc. Buy diapers in bulk; i have found that the bulk diapers at Target are cheaper than Sams because you can use coupons at Target. breastfeed if you can. see how your baby responds to fragrance free detergent before limiting yourself to Dreft.
don't think you have to buy a whole baby bedroom set- the only baby furniture in our nursery is the crib. Everything else is regular furniture (stick a changing pad atop a regular dressing for a changing table).
find a friend to swap kids with. My friend and I have had this arrangement for years; every other Friday I have 4 hours of time to myself in exchange for watching her kids the next Friday.
That's my budget rant. Kristan, due 11-1, #3