There is now integrated Google Talk in Gmail. This is neat because now you can chat while looking through your mail. No need to open up new windows or tabs. Another neat thing about this is that when you point your cursor over a contact, it will tell you the name, email, and other nifty information, along with buttons that let you email that person, and gTalk with that person.
All in all, gmail has been improved a lot.
All in all, gmail has been improved a lot.