1) Yes, I just tested it with Drag/Drop from the local file system, worked 100% like Outlook in IE9.

2) Works fine in Firefox and Chrome overall (as in, looks right, doesn't complain like Exchange 2003 used to, etc.). Drag/Drop did NOT work in Firefox or Chrome, neither seem to support that functionality at all.

This is on Exchange 2007, so the Exchange 2010 version may be even further improved.

J.Ja