Nanny Share in Boston

Hi ladies.  I'm expecting a girl in July and am starting to think about childcare options after materninty leave is up.  I'm wondering if anyone has any experience with a nanny share.  It seems like a really good option in terms of care, convenience, and price.  I would love to hear any experiences with this.

Also, probably a long shot, but let me know if anyone would be interested in possibly partcipating in a nanny share.  I live in South Boston and would be looking for care 2-3 days a week starting around the end of October.