Logging into my favorite mail service, Yahoo! gave me a pleasant surprise, the yahoo mail and messenger integration. I have not used it yet, it feels strangely different to use a chat client with a browser, but I had pleasant experiences with their new web messenger, so this should be cool!
It definitely looks better than the gmail chat, which intrudes my privacy with all those context based ads. And hotmail live which seems to be a bit heavy even for broadband!