A while back, Google started offering inexpensive storage upgrades for Google Docs
storage. Now, users with a domain set up on Google Apps
can purchase additional storage, too. The change means you can boost your disk space to 20GB for a paltry $5 per year, or a whopping 1TB for $256 per year (which works out to about $22 per month). That's a very reasonable price for additional cloud storage, and well worth it if you're a heavy Google Docs user.
The space is shared with Gmail as well, so you'll be boosting your mailbox capacity
(Thanks for the correction, Nathan!
). Hit the Google Enterprise blog
for full details!