I was just checking my Gmail account when I noticed some cool new features added. The first thing that caught my eyes was the Reply on top thing and along with it was the dropdown with some good options like Reply to all, Forward, Print, Report Phishing, etc. Cool tooltips to help you find the newly added features at Gmail is also added. Most of all I can now send offliners to my friends in Gmail through the chat console! This is something I frequently do in the Yahoo messenger once my friends appear offline. So from now on if you send any offliner it will appear as a new mail. I can send him a mail if he appears offline anyways.
The five newly added features are:
- Reply on top
- Embarassment-reducing new message notifications
- Forward all
- Chat even when your friends are offline
- Get Gmail on your mobile phone
Source: My eyes 
and http://mail.google.com/mail/help/about_whatsnew.html
