Hello,
I find ArcGIS Explorer a good way to view maps, however I have a really hard time finding a way to expose data from my ArcGIS Online trial account to it.
When I browse the layers from the Layers button all I see is 4 layers, which are some basic ESRI layers. When I do a search from the Search Window button I am able to find the maps that were created in ArcGIS Online, but when I try to add them, all I receive is the Basemap and not any of the feature services or layers that have been added.
I was googling this problem for some days now, but without any result. There is a tutorial on ESRI's resources web site on how to add content from ArcGIS Online, but for me the button ArcGIS Online on the main menu and at the drop-down Add Content button is completely missing.
I'm running ArcGIS Explorer 2500 on Windows 7 64-bit machine. ArcMap works just fine.