Wallwisher has been making some changes recently and I have written about them here and here. Now, the most recent change is its name. Padlet, it is the portmanteau of paper + wood + tablet...the rock kind, as a tribute to our ancestral beginnings of writing. If you have been an avid user of Wallwisher, then you will have nothing to worry about with the name change. It will not affect previous walls that you have created and there will be a period where you will be redirected to the new URL in the future. To read more about this change, check out the Wallwisher Blog.
To see suggestions for using Wallwisher in the classroom, see my previous post about this tool.