The 60th edition of the Genealogy Carnival is an Alzheimer's themed collection, in honor of National Alzheimer's Disease Awareness Month. Some very powerful stuff, and also historiographically fascinating.
The 11th edition of the Indian History Carnival has some very interesting material.
4 Stone Hearth, the anthropology/archaeology carnival has a nearly all-archaeology edition
Don't forget, Cliopatria Award Nominations are open for another ten days!