Meebo, an online Instant Messenger (IM) has gone under a huge overhaul on the graphics and has added a few little bonuses, making the leading online IMer (In my opinion) even better.
Update Skin (check)
Drag and drag contact list for easy managability (oh ya! check!)
POP OUTS! (CHECK!)
Optimization (Faster load times baby!)
Improved Chat logs! No more stupid text on top of the users avatar.
With all these improvements it is easy to see what this is consider by many to be one of the best online IMers out there. If you never tried it before give it a hook. Its a great way to keep in contact with your buddies if you are at work or school.