On the iphone, in the mail ans contact settings, just create a Google mail account. It will sync mail, contacts ans calendar automatically. Make sure that you set Google as your default account.
For the iPad, there is a little twist... Create a Google mail account, it will give you mail, calendar and notes. For contacts, you'll have to add an Exchange account using the server m.google.com as the exchange server. Just enable contacts for this account since everything else will be manage by the Google account.
That's it! Make sure that your default account is Google/Exchange for the contacts and not the local device.
VicoPad addict!