I had not heard that. Did it say that specifically in the email from Apple?
Apps are basically "sandboxed" (and will be more so in the future) for security purposes. It seems likely that you'll still have to start with the app that has the file you want to email as you do now but I could be wrong...I haven't seen that email. Anyone else?
I kept a list of the main iOS 5 features and here are the updates for Mail:
- Drag to rearrange recipients
- Text formatting (bold, italic, underlined, indent)
- Flag emails
- Mark several emails as read at the same time
- Add and delete mailbox folders
- Search full message
- Warning if you forget to add a subject
- Easy Hotmail set up
- Select tone for Email Sent in Settings app
- Select tone for Email Received in Settings app