I have been wanting to use this for a while, but really try to only use 'stable' extensions as its just to difficult to explain to users why we use something in beta. In the windows based desktop world, this is a common request. Thx.
Topic on Extension talk:MsUpload
It looks like there's at least one bad bug on the workboard, so probably this should stay as beta till that's fixed. That said, I think quite a few people are running it in production without too many dramas.