So what does this new version of the RDP client for Mac have? Microsoft Remote Desktop Connection Client for Mac 2 features a redesigned user interface, improved customization options, and the ability to connect to multiple Windows-based computers at the same time. The following table lists the latest improvements to Remote Desktop Connection.

Universal binary
Runs on both Intel-based and PowerPC-based Macs.
 
User interface and menu bar
Simplifies the connection window and expands the menu bar to include menus for common tasks (File, Edit, View, and Help). Application preferences are now located on the RDC menu.
 
Remote Desktop Protocol 6.0
Improves performance and compatibility with Windows Vista.
 
Multiple sessions
Connects to multiple computers when you save a connection file for each computer. Use the new File menu to open new, saved, and previously opened connections and to manage all changes to connection files.
 
Better customization than Remote Desktop Connection 1.0
Accepts changes to application preferences, such as keyboard shortcuts, during a Remote Desktop session. Changes take effect the next time that you connect.
 
Automatic reconnection
Reestablishes a remote session when the network connection is lost.
 
Screen sizing options
Runs the Remote Desktop session in a resizable window or in full-screen mode.
 
Printing
Prints your Windows-based documents to any printer that is connected to the Macintosh computer.
 
Network Level Authentication
Verifies the identity of the Windows-based computer before establishing a Remote Desktop connection. You can select this option when you connect to a computer that is running Windows Vista. Network Level Authentication is more secure than authentication options in earlier versions of Windows.
 
Wide-screen resolution
Provides settings for improved resolution on wide-screen displays.
 
Server console sessions
Speeds login when you specify "console" as part of the computer name.

Read more and download from the Mac blog at Microsoft.