I am impressed with recent new features by GMAIL.
a) New Coloured Labels
b) AIM chats

The former offer a useful and unique visualization for me to easily differentiate the source of my mails. Was using GreaseMonkey from Better Gmail, but not functional with new upgrade of GMAIL. However, we are blessed with the latest cool features. Do try to organize your mail with this feature.

For IM, great to see the AIM has been added in Gtalk and wonder will the the other services MSN, Yahoo IM will be added. Maybe not ......