I'm more and more motivated to just cobble together my own dropbox (I know that several folks here have done just that) for my simple needs, to be what dropbox originally was. Their ui has become ridiculous, and 'features' like image spy serve them more than me.
Take a server with sftp access, so you can mount it locally and browse with winscp if you need to. Put filestash on top and you have a nice ui. That's probably 90% of the original features