We use cloth and love it!
DD is 18 months and we've used cloth since she was 4 months old. We use a variety of brands, but prefer pocket styles and All in Ones. The AIO (all in ones) are for my DH and my parents to use when they are with DD.
I frequent the websites diaperswappers.com and the diapering your baby board on babycenter.com. The babycenter board has a diaper swap each Thursday where you can buy or sell your used diapers. I have bought a lot from there, and I have also had good luck on diaperswappers.
As for what you will need. You will want to decide which style you like...
prefolds/covers - cheap, but take a bit more work. They do have snappis now, so no pins to worry about.
fitteds/covers - bit more pricey than above, but no folding.
pockets/inserts - bit more pricey, but very effective. These are my favorites, but I've never used the above diapers. You can customize your inserts..so if you are going to be in the car for an hour, you many want to put an extra insert in. These are very versatile and I stuff a pocket with a 'leobaby mightynighty' at night and have only had one or two leaks in all the time we've used them. Both leaks were just damp, rather than a full-blown wetting, and came from the velcro tab area.
AIO (all-in-ones) - Probably the most expensive, but very easy and convenient. I don't think they absorb quite as much as a pocket w/ one insert, but they are worth it for the convenience of not worrying about inserts for sitters and DH.
I wash every other - third day. I have a diaper sprayer to spray poops into the toilet (I highly recommend these) and then I place the diaper into a dry diaper pail lined with a cloth pail liner (wet diapers go straight into the pail). On wash day, I wash the liner along with the diapers.
I wash with Sun liquid detergent from Walmart and I use a very TINY amount in each load. Probably less than an inch of liquid in the lid/measuring cup. The diapers always smell fresh and clean and I haven't had a problem with build-up. (knock on wood that I didn't just jinx myself)
I do a cold pre-rinse, then a hot wash w/ cold rinse, then an extra cold rinse.
I dry the diapers and inserts in the dryer most of the time, but I do finish the AIOs on a drying rack as they aren't always dry when the cycle is complete.
I now have about 25-30 diapers in our collection, but I started with just 12 and washed everyday, or sometimes every other. I didn't use cloth when DD was newborn, but I've seen there are several posts w/ advice on the best styles to use for itty-bitties.
I agree with the above post about potty-training early. My DD is 18 months and already asks to use the potty occasionally. I'm not pushing it, but she is genuinely interested and already has an idea of how it all works.
I don't use diaper rash ointments with cloth, so I put her in disposables if/when that happens and return to cloth when she's all cleared up.
I use cloth for daytrips and overnights, but switch to disposables if we are gone more than one night. We don't do that much so I've only bought disposables two or three times in the last 14+ months.
When we are out, I keep a wetbag with me. I keep one in the diaper bag at all times, and an extra in the car w/ a spare diaper and wipes.
When I change her I just put the wet/dirty diaper and cloth wipes in the wetbag. Then I just empty the wet bag into the diaper pail when I get home, spraying any dirties in the process.
Sorry this has gotten so long. I love using cloth and it's so much easier than people think. There are no smelly wet buckets in the bathroom or soaking diapers in the toilet.
Cloth rocks
