What sort of info are you looking for?
I started out as a nanny, then when I had my 2nd child I was a registered childminder. Now that my children are older (14 + 19) I have gone back to nannying.
The earning potential is less as a nanny - though I am on more money now as I never liked to have my full limit of children as a minder, I much preferred having just 2 or 3 lo around.
Now I don't have lots of paperwork, only one set of parents to deal with, only one nursery to drop of at, tax and ni dealt with for me, my house is back to normal - no more stair gates and toys everywhere.
As a childminder you are much more your own boss - you decide your policy's, activities etc and parents have to look for a childminder that suits their ideals.
As a nanny you are more of an employee. What mb and db say is how it has to be done - but hopefully you find a job where your values and childcare styles are very similar.
I have found that being a mother of 2 older children has been to my advantage at interviews. Within 2 weeks of registering with an agency I had 4 interviews, was offered 3 of those jobs, so I had a choice .