One thing to definitely note about the Nokia N900 is the 16M-color WVGA screen, which is virtually unmatched by other smartphones - platform limitations are hard to get around. There is of course the Vodafone 360 H1 produced by Samsung and running LiMo but it's very much a niche device. It has a feature of adding QWERTY keyboard, which turned out pretty comfortable despite the three-row layout, and things are starting to get there.
If you are using internet on your mobile phones then Nokia N900 is the best for you. The internet tablet genes are strong in the Nokia N900 so connectivity and web-browsing are its greatest virtues. The large high-resolution display and great typing skills are the right kind of backup but we've seen plenty of similar packages already.
Technical Details of Nokia N900:
Display
* 3.5 inch touch-sensitive widescreen display
* 800 × 480 pixel resolution
Web browsing
* Maemo browser powered by Mozilla technology
* Adobe Flash™ 9.4 support
* Full screen browsing
Camera
* 5 megapixel camera (2584 × 1938 pixels)
* Image formats: JPEG
* CMOS sensor, Carl Zeiss optics, Tessar lens
* 3 × digital zoom
* Autofocus with assist light and two-stage capture key
* Dual LED flash
* Full-screen viewfinder
* Photo editor on device
* TV out (PAL/NTSC) with Nokia Video Connectivity Cable (CA-75U, included in box) or WLAN/UPnP
* Landscape (horizontal) orientation
* Capture modes: Automatic, portrait, video, macro, landscape, action
Video
* Wide aspect ratio 16:9 (WVGA)
* Video recording file format: .mp4; codec: MPEG-4
* Video recording at up to 848 × 480 pixels (WVGA) and up to 25fps
* Video playback file formats: .mp4, .avi, .wmv, .3gp; codecs: H.264, MPEG-4, Xvid, WMV, H.263
Music and audio playback
* Maemo media player
* Music playback file formats: .wav, .mp3, .AAC, .eAAC, .wma, .m4a
* Built-in FM transmitter
* Ring tones: .wav, .mp3, .AAC, .eAAC, .wma, .m4a
* FR, EFR, WCDMA, and GSM AMR
Main disadvantages
• Large and heavy
• UI only works in landscape mode (for now)
• No smart and voice dialing
• Outdated camera interface and features
• No preinstalled voice-guided SatNav application
• No voice recorder, no MMS, and no handwriting recognition
• No FM radio application (despite that the hardware's there)
• Limited third-party software availabilty
• Limited 3G support in the US (no AT&T)