While may people today use Facebook as a main form of communication, the one area the site has yet to really improve on is their built in messenger. While the current version is efficient, it is not always the cleanest, and can be annoying to use depending on what else you are doing, aside from the fact that you have to have Facebook open to stay signed in.
One option is to use Adium, which works great as it is highly customizable, the other is to use the more simplified and Mac like iChat. Simply go to add a new account using the following settings:
Account Type: Jabber
Account Name: Username@chat.facebook.com (User Your Username)
Password: Your Password
Server: chat.facebook.com
Port: 5222
User SSL: No
User Kerberos v5 for authentication: No
Now click done and close that Facebook window because you can now stay signed in through iChat!
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Mac guy and PC guy can fight for supremacy until the end of time, but there's one simple fact that anyone who's worked on both Mac and Windows knows: Some applications are better on the Mac, others are better on Windows. With the latest version of the Windows-on-Mac virtualization tool Parallels, you can set default applications across platforms, meaning that if there's an application that you prefer on Windows, you can set files on your Mac to always open with the the Windows application (and vice versa). With Parallels, you can create the ultimate hybrid operating system.
The unholy union of Windows and Mac got especially exciting when 
Setting up your SmartSelect defaults is as simple as point-and-click. In either Finder or Windows Explorer, right-click (or Ctrl-click) the file you want to open and select Open With. You should see a list of applications, Windows and Mac, associated with that file. If you're doing this in Windows, Mac apps will be named .app (like Firefox.app) and include 'Mac' in parentheses after the title of the program. On your Mac, Windows programs will have the Parallels icon superimposed on the application's icon to indicate that it's a Windows app. To open a file in a different application just once, select the application you want to use to open that file and that's all. Windows or Mac, it should open the file in the program you selected. 
To set an application as the default for that filetype, you just follow the same set of steps you normally would on the respective OS. In Windows, right-click the file and select Open With again, but this time select Choose Program.... Pick the program you want to set as the default and check "Always use the selected program to open this kind of file."
On the Mac, right-click the file and select Get Info. Toward the bottom of the Info window you should see a section labeled Open with. Select your preferred default from the dropdown and click Change All.... Any file on your Mac ending with the same filetype should now always open with the application you've chosen, Windows or Mac.
The above method should work to change your default application for virtually any filetype, but when it comes to unifying your browsing, email, and FTP clients, you have to take a different but equally simple approach. Just go to the Parallels Desktop preferences and select the General tab. In the section labeled Shared web applications, you can change the default application for web browsing to Open all web pages in Windows, Mac, or in the default for each OS. If you leave it set to Default, you'll end up with different browser windows, for example, running on Windows and Mac. Setting your browser to a specific OS will ensure that all your browsing is unified, a feature I've been dying for from Parallels. The same is true for your preferred email and FTP clients.