Review: Samsung Galaxy Note for AT&T
The stock Android messaging tools are on board and cover the basics with aplomb. The SMS application remains simple yet powerful. Messages are threaded in a conversational style, and media (photos, video, audio) fall in-line with the text. The usual two Android email applications are also present. There's the generic email app for POP3/IMAP4 and Exchange, as well as the native Gmail application.
On the instant messaging side of the equation, the stock Google Talk application is on board for Google users, but a catch-all application for other services is missing. If you want to chat via AIM, Yahoo, or Windows Live, you'll need to seek out a third-party solution from the Android Market.
Samsung's Social Hub is on board. It lets you manage nearly everything — email, SMS, Facebook, Twitter, even your calendar — from a single portal.
The full Facebook app is pre-installed; Twitter isn't.