The NY Times today has a serious of articles about ACS2005-2009. Most interesting is the interactive map at the Census Tract level for the whole nation. The maps show household income, home value, education and race and ethnicity at each tract and also the percentage change from the Census 2000.
Here is the link. Mapping America: Every City, Every Block.
Some data folks, knowing the flaws in early ACS methodology, may grimace, especially with the Census 2000 comparisons. But it's out there.