Once you setup an HQ account you will notice at the bottom of the account balance page there is a referral link or you can also refer your friends which brings up an window with the following pre-populated e-mail:
I have signed up an account on DriveHQ.com. It has the best features and software tools. You can share photos and files with others, synchronize local and remote folders, automatically backup files and emails, host business-class FTP and emails, etc.
I strongly recommend you signing up a free account using this URL: http://www.drivehq.com/secure/SignUp.aspx?refID=4417695
Here are the first 4 reasons to sign up on DriveHQ.com:
1. As easy as Windows Explorer and FTP;
2. More and better features than any other websites;
3. Share files and folders to different people with different permissions.
4. Extremely cool software: DriveHQ FileManager and DriveHQ Online Backup.
Online Storage & Sharing, Online File/Email Backup, FTP Hosting, SMTP/POP3/Outlook Email Hosting.
Drive Headquarters, the best service since 2003, like no other services!