GAOSHAN  In the interest of promoting open source, check out Porticus for a free MacPorts GUI tool.

http://www.macupdate.com/search.php?arch=all&keywords=porticus&os=macosx  
(Version 2.4)

ZEPHYRIS  The interface is rather ugly looking for $20  
(Version 2.0)

JEDIK  No release notes? What's changed? It takes forever to launch, much more than the previous version (0.8). =\  
(Version 0.9)

JEDIK  Yes, I agree with the previous post. But I think that it could be avoided with a little more care about the released version or at least with documentation. I was using the previous version with no problem. After upgrade it won't launch (kept boucing in the Dock then nothing) in the first time I run it. It worked the second time.  
(Version 0.7)

ANONYMOUS  Port Authority has the potential to be very useful. However, it has a number of quirks.

For example, downloading it and placing it in Applications will result in it hanging on launch. The application needs to be inside a folder named "Port Authority", inside Applications in order to work properly. Also, sometimes it won't accept your password (as in, you can't physically enter it in the password field).

Since it IS still a beta program, none of this should surprise you. If you prefer GUI to the command line, you should give this a try.  
(Version 0.7)