Yes ,gmail give it you 1Gb but even rediff gives you same ,then what makes gmail click.
I think it is exclusivity that Gmail holds that makes the G capital.I found that gmail's "invitation only" enrollment process is the key to the attraction it still holds.It works like a pyramid scheme where only blogger members (owned by google) and those you are "invited" get their id @gmail.com and now there entire sites which cater to people who want gmail or those who want to barter a gmail invite for something ( read gmailswap.com).
I too bartered an invite for a postcard from Mexico City.
Anyway this being my 101st entry .. I thought I'll give away my 3 remaining gmail invites.
Thus for the first three lucky people who mail me at email@example.com get the invites.
In other trends looks like amazon's A9.com is giving google a run for it's money.