A google search on uploading and the Viewer2 beta brought up this great set of instructions from the Sasy Pants Blog.
So it's in my inventory...
"UPLOAD has now moved to Inventory folder. All your upload functions are now in this area, so if you want to bring a picture, sound file, animation into world you will have to do it from the FILE menu in inventory."
Thank you to Sasy Scarborough for the great post on the whereabouts of the familiar options in the new UI!