AOL recently made available their new version of AIM, called AIM Triton, as a beta test product (ver 0.8.8). It has a much different look than the AIM you're used to. The notable changes:

• A merging of IM, EMail, Voice Chat, Text Messaging, and Video Chat
• Chat window has tabs for conversations (like more recent AIM versions)
• Longer away message capacity (finally)
• More friends can be added (up to 500)
• Better file transferring, including large files
• Desktop and web search
• 2 gigs of email with the ability to tell if someone read the message (for all you creeps out there) and also to unsend a message that hasn't been read (only if you sent to another AOL/AIM user. Email also allows 16MB attachments.

See a demo here and download it here.