Once you create an account with Evernote and download the iphone app, open up the app, tap the sync icon(all the way on the right), then scroll down and it will say "Evernote email address". Tap it and then tap "Reveal in Contacts".
Then just forward emails to "Evernote" under contacts.
My only issue is that this app doesn't have a passcode lock like DropBox.
Otherwise very nice and free service/app.