YouSendIt technical support is currently investigating reports of the "upload from desktop" button missing from the send page.

This button is an Adobe Flash component and requires Flash version 9 or higher. The current version of Adobe Flash is 11.4. If you are experiencing this issue, please check your Flash version: http://www.whatismyflash.com/
Or update Flash on your computer: http://get.adobe.com/flashplayer/
Updating Flash will typically resolve this problem.
If you already have Flash version 9 or higher and are still this problem, we would appreciate it if you could comment on this article and provide information on your operating system, browser and version (example IE 8), and Flash version, to help us better understand this issue.