I stumbled across a really nice IM client called Digsby! I didn't see any other posts on here about it so it hought I'd write one =]
Digsby is a Windows IM Client (coming to linux and OS X soon!)
It supports a lot of clients like :
-AIM
-MSN
-Yahoo!
-ICQ
-GoogleTalk
-Jabber
-Myspace Alerts
-Facebook Alerts
-Twitter Alerts
More clients are also in development and coming in the future hopefully like:
-XFire
-Skype
-and more!
The application is very customizable. The contact list, and messaging box can both be skinned and they have themes very similar to IEView themes built in!

It isn't as skinnable as Miranda, but it is still a young application and I am looking forward to see more development. It supports Aliasing, Grouping by Status, Listing by Status, Buddy Merging, and iTunes support. Please try the this great application out!

It also features a pop up window that when your are working in a different application such as Firefox or Internet Explorer, and you receive a message a pop up is displayed that shows the text of the message, and even has a box that you can reply in without leaving your current window, which is also easily skinned!

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