COWPIEBINGO  I was looking for something exactly like this today, and I was glad to see that someone had made a client like this for Facebook Chat. It works perfectly!

I'm really impressed with all the cool interface effects too.

Good job!  
(Version 0.1)

COWPIEBINGO  ...And that, ladies and gentlemen is the kind of friendly support you can expect to receive as a paying customer.  
(Version 5.0)

COWPIEBINGO  Horrible little company. I have been a user for years now. I paid full price for a SD3 license, paid the upgrade for SD4, and today SD4 automatically downloaded and *installed* the newest version 5 which has suddenly and without warning reverted to shareware and is now asking for more money.

I will not be extorted like that, and I will *never* buy anything from these jokers again.

Do not give your money to these people.  
(Version 5.0)

COWPIEBINGO  Seems useful!  
(Version 3.2.11)

COWPIEBINGO  I like the .Mac integration.  
(Version 3.1.1)

COWPIEBINGO  I won a free registration! Thank you!  
(Version 3.1)

COWPIEBINGO  Great icon!  
(Version 3.1)

COWPIEBINGO  Not compatible with Safari 3.0 beta.  
(Version 2.6.7)

COWPIEBINGO  Why bring race into it?  
(Version 3.1.5)

JEREMY  Thanks for downloading! Tiger Mail.app doesn't respect the 'hide' setting.  
(Version 1.0)

JEREMY  Looks promising. I like the iLife integration, I was pleasantly surprised to launch Blog.Mac and see my current iTunes song.

I would definitely go with either Aqua or Plastic interface. 100% metal is more suited to tiny programs that use just one window, such as Backup or iSync.

One thing that I would suggest as an improvement would be a wizard that appears the first time you launch the program to guide step-by-step the creation of a new blog. I was a bit overwhelmed by all the tabs and options.  
(Version 1.0.1)