Image upload sites for screenshots and temporary code hosting sites like pastebin.com are critical for support in forums and IRC, but there’s no way to really share a working product aside from putting an exe or app in a place to download.
Would be cool if my unity account let me upload a .unity3d bundle to:
http://share.unity3d.com/m4id9b
and it would just run in the browser, and remain at the url (until scheduled deletion in an hour/day/whatever)
Obviously, there are already ways to share running unity projects for support reasons, but none of them are as nice as this idea.
I should probably have used http://feedback.unity3d.com/ for this post… but I already spent all my votes on Unity editor for linux.