Is anyone aware of a Visual Studio 2010 Add-In that will automatically allow you to attach to a running instance of the ASP.Net Development Server? And if there is more than
I don't know of any such add-in but you can more easily attach to the process using shortcut keys and pressing 'W' to scroll to the WebDev process.
Ctrl+Alt+P - Attach to Process
(process window now has focus)
Press W, which jumps to processes starting with W
Press Enter to attach
Not an addin but you can do it without touching the mouse.