I'd love to try cloth but have put it in the too hard basket - for me, personally - and I wouldn't knock those who use them but need to point out that sposies aren't $30 a week - not in my house anyway! I pay about $13 a week for Huggies for DD. I always buy the boxes and grab several when they're on special. You can often get them for under 30 cents a nappy.
Generally they're around that much a week, around here anyway. And I myself couldn't factor spending extra on nappies to stock up if they're on special. It just wouldn't work on our budget.