Sync Google Contacts To Your iPhone Contacts

Ok, this is fairly straightforward if you've already set up your Mail/etc on your iPhone to use Google Mail as an Exchange account.

If not, you've got some backing up to do, but it's ok - this blog post documents the whole process and makes it fairly painless:

• http://www.simonblog.com/2009/02/14/how-to-sync-google-contacts-calendar-with-iphone/

One warning it makes: You will lose all your contacts and calendar entries if you simply sync with Google with importing your existing contacts into Google first!