I'm looking for DD right now, and have found that we should probably budget about $1200/month. Places do vary, even as PP said about Kindercare and similar being different prices depending on the area. That said, my favorite places so far have been around $300/week, and I even found one for $466/week (which our budget does NOT allow!)
I don't know much about home daycare because I do not feel comfortable doing that for infant care unless I know the person well.
You may also want to check out Minnesota Childcare Resource and Referral. They will give you all kinds of great info and you can even request someone to help you scout places out!