The quality and attractiveness of the infographics I see lately, is getting better all the time. Take for instance the one designed by archives.com on occasion of the "publication" of the 1940 U.S. Census. (The earlier ones are available already for a long time.) The big day is Monday next, April 2. So if you want to look up ancestors who lived in the States in 1940, this infographic may be useful. And otherwise it is nice to look at.
If you need essential information about Enumeration District Numbers etc. consulting Randy Seaver's blog Genea-Musings is a good idea. Now, let's wait and see whether all relevant servers will hold next Monday! The interest in these records seems to be overwhelming. And if you want to start early on April 2 and you live here, please keep in mind there is a time differene between here (Europe) and there (U.S.A.).
Update April 3, 2012 23.12 GMT Within 12 hours from the time the census became available NARA scored some 37 million (!) hits. Response times of half an hour were no exception and there was a lot of grumbling on twitter (#1940census).
Update April 5, 2012 Archives.com released yet another infographic about the #1940census. A very impressive project!