While researching McCain, I came across the Sparrowblog which has alot of very interesting information about the potential first children. In general, I think the press (and bloggers) should not put children under the scrutiny of their parents, but this site seems to offer light-hearted, noninvasive, and freely offered info about the kids. One recent interesting post links to several first children blogs. Here are the links:

http://fivebrothers.mittromney.com/
http://www.mikehuckabee.com/?FuseAction=Blogs.View&Blog_id=693
http://blog.johnedwards.com/Cate
http://mccainblogette.com/