Gephi 0.7 alpha2 was just released. It increases stability and fix issues that were reported on our forum and bug tracker. Thanks for your valuable feedbacks!
Normally, for minor versions like those, Gephi updates itself by asking users to update when Gephi starts. This AutoUpdate feature was not yet available for 0.7alpha but is working now. Therefore users need to download this new 0.7alpha2 version to profit for upcoming updates through the plugin center.
Check releases notes and download latest version. Please uninstall previous versions first before installing it.
One can find many network and graph datasets on this wiki page.
Gephi blog 
What about a draft video about the new philosophy and features ?
We’re working on a “madness” video, following by some tutorials.