Just recieved the 4.1.2 Update OTA from T-mo... which includes the Multi-window feature. I have tested it and it works rather well ... seems limited to certain apps... so possibly not all your apps will be supported. There is an "edit" button for apps ... but I have not explored this yet ....
will update if I find issues or other points of interest with the feature.
will update if I find issues or other points of interest with the feature.