The Nokia 'N Series' Mobile Internet Devices (MIDs) have been around in various guises for several years, but in some ways they have been Nokia's 'Best Kept Secret' in terms of their unparalleled scope for customisation.

Running on a Linux based OS called Maemo the N700, N800 and N810 tablets were seized upon by the hobbyist and enthusiast market.

But now, with the introduction of the N900 device the MID has stepped out of the shadows, and introduced itself to the mainstream market.

The N900 is the first of Nokia's MIDs to be fully phone equipped - able to make calls over the air rather than being limited to VoIP clients such as Skype. That's not to say that you can't do that with the N900, the boffins at Nokia have managed to fuse the qualities of a mini computer with the technology from their award winning handsets.

As you may imagine, with such a wide range of functionality there will always be a trade off in device size. The N900 weighs in at 181g and has dimensions of 110.9 x 59.8 x 18 mm.

The size however, allows for some generous screen real estate; a 3.5in, 800 x 480 resistive touchscreen making the N900 a great device for multimedia playback, and with 32Gb of onboard storage there's plenty of room for your movies and music.

The device also offers a 3.5mm audio jack - a welcome addition for anyone wishing to use their own headphones.

A slide out QWERTY keyboard further adds to the devices pedigree, giving the weary road warrior the option of leaving her laptop behind in favour of the N900's all-in-one versatility.

But it doesn't stop there. The N900 boasts a 5mp camera with Carl Zeiss optics, auto focus and dual LED flash. The phone also has GPS, and can automatically geo-tag your photos when you take them.

The N900 stands out from it's less polished cousins by a country mile. The MID has come of age, and is no longer the preserve of the gadget lover.

It looks like Nokia have done it again.