"In an effort to further enhance Google Apps Premier Edition, Google has announced that all accounts will now have a limit of 25GB and have access to Postini email and security services.
Google is aggressively targeting businesses with this update, by allowing them to run their existing email solution side-by-side with Google Apps to test the advantages of their system. Google last month announced it had acquired Postini, and has already integrated the service into Google Apps Premier edition.
All Google Apps Premier customers will receive 25GB limit per mailbox (an increase of 15GB over the initial 10GB allocation) at the same cost of $50USD per user account per year."
For details check source.
I am happy with my Windows Live Hotmail, though I also have gmail accounts. And one of the gmail account (regular) is of ~15GB. Has anybody else have such account?