The 2005-2009 ACS 5-year estimates include estimates on most (but not all) topics included in the survey. Several topics that were added or modified in 2008 and 2009 are not included in these 5-year estimates. These include Bachelor's field of degree, disability, marital history, health insurance coverage, and service-connected disability status and ratings. The first 5-year estimates for these topics will be available in the 2013 release of the 2008-2012 5-year estimates (except for Bachelor's field of degree, which will be available in the 2014 release of the 2009-2013 estimates). For a complete list of topics covered on the ACS questionnaire, browse Subjects included in the American Community Survey.
For the advanced dataland geeks, you can even compare tables between the 2005-2009 ACS 5-year estimates and Census 2000 SF3! Geek-a-rama!