The iPad 3 is a device that's really about consuming media than creating it (at least when it comes to prose) and as such, you wouldn't label it a message-centric device.
However, that doesn't mean it's not one of the best out there, as when it comes to the likes of emailing it's simply brilliant if you can get past the slightly odd keyboard.
New iPad 3 review
We'll start with Apple's keyboard on the iPad, as it's consistent throughout the OS. It's a great option in our eyes if you're one of those that's invested in a SmartCover to help bring some elevation to the screen, as you can use it as a desktop keyboard pretty easily - although you'll need to get over the lack of feedback under the finger and the dull 'thunk' as your digits bash the screen.
New iPad 3 review
However, it's not as good for holding the new iPad 3 and trying to get a missive out to the world; cradling it in landscape mode means you can't hit the middle keys as easily, and when in portrait you've got the issue of the device being quite top-heavy so it's again an uncomfortable experience.
You can open up a split keyboard to make it a little easier to type in the hands, but be warned this is at the expense of accuracy.
So in summary: accuracy of keys good, holding iPad to type bad.

Email

The email client on the iPad 3 is pretty goshdarn good in our opinion - the iOS email app is second only to Windows Phone in our opinion, and that's not got a tablet category, so Apple's way out in front here.
From the range of mail portals you can use (many) to the ease of getting notified of an email (unobtrusive - a little pop down from the top and it will sit in your notifications bar), it's a simple way of using the iPad as a decent background emailing device.
New iPad 3 review
The email interface itself is also good - a unified inbox allows you to combine both work and personal life, but in truth many will prefer to bounce between to two. A list pane can be called up whenever you like, meaning it's easy to read an email and then jump back into the inbox with a flick of the finger.
It's elements like this that make the iPad 3 a different beast to the iPhone, and Apple has recognised this. Text is also much more legible on the Retina Display - we're not saying it was terrible before, but we definitely felt it was a more comfortable reading experience.
The other key feature the iPad 3 has is the ability to wander through mail folders - many people are dealing with email overload these days by sticking them in separate folders for later, and it's key to be able to get access to these without having to mess about with thousands of taps.
New iPad 3 review
Searching for email is similarly easy - you pull down from the top of the screen to get access to the search bar, and from there you can easily ask for any word in an email that might have been put somewhere - be it the sender's name, subject or general message text - plus the server searches are very speedy as well.
If you've got an iPhone or iPad already, the above will be of no surprise to you - the new iPad 3 doesn't really take this story on any further, except to make text more legible - but it's worth mentioning as it will be a key feature to many prospective buyers.

Dictation

Dictation is also included in the place of Siri on the new iPad, and while there are some editors out there that think this is going to be the end of the Dictaphone when it comes to transcription: think again.
We've no idea why Siri isn't included on the new iPad, but the dictation service is only 90% accurate in our tests, which just isn't enough to consider switching from the normal keypad when writing an email.
In truth, the accuracy is better on a Samsung Galaxy S2 when it comes to voice recognition – not by much, but for this service to work it really needs to be bullet proof. And after the song and dance Apple has made over Siri, why is it not included in this more powerful machine?

Twitter

It's not really messaging as such, but it's worth mentioning Apple's deep integration with Twitter. Well, deep as in you can Tweet a photo directly from the Gallery app, as there's no on board client or anything to mess around with, nor can you assign Twitter names to contacts.
New iPad 3 review
However, when you take a picture there's an option to post it straight to Twitter providing you've linked up the account in Settings – plus you get a pleasant little chirping sound when it sends. Nice.