WHY USE GMAIL?

It has inbuilt Video chat as well. {: which no other online email service provides.

www.youtube.com/user/Gmail
http://www.youtube.com/user/Gmail#g/c/2754F81B9B8ABBA6
http://www.youtube.com/watch?v=JFGJRfoK9xQ
http://www.youtube.com/watch?v=lBaaYVufM_Y
http://www.youtube.com/watch?v=3lDQ-1ZB4OE&feature=fvst
http://www.youtube.com/watch?v=irbanYlNDgc
http://www.youtube.com/view_play_list?p=8A0C9023238F7724&playnext=1&v=79tyCWsIoYY
http://www.youtube.com/view_play_list?p=2754F81B9B8ABBA6&playnext=1&v=LvWsYk531mo

you can watch the above videos

Or

simply sign up on mail.google.com/mail/signup

Or

want to read more go to official gmail blog:
gmailblog.blogspot.com

Or
Read more:

http://mail.google.com/mail/help/intl/en/about_whatsnew.html

5 little-known Gmail features you may not yet know about via gmail official blog (gmailblog.blogspot.com)