The O2 Xda orbit, which is based on the HTC Artemis, comes nevertheless in a different ID which is called "HTC Cruiser". As the HTC Artemis reference design, the Xda orbit is also sporting GPS as the highlight (together with a FM radio, which is also used for dynamic traffic information) but also, unlike it is expected from T-Mobile, O2's version will definitely featuring W-LAN b and g.Other features are a full range of connectivity with GSM/GPRS/EDGE, Bluetooth 2.0 (including support for A2DP Bluetooth stereo) and Wi-Fi b/g as well as a 2 megapixel camera. The Xda orbit will also features HTC RollR (Trackball/Trackwheel combination) for easy viewing and navigation through the menus. 

Specifications:

General    
Network     GSM 850 / GSM 900 / GSM 1800 / GSM 1900
Announced     2006, September
Status     Available
Size     Dimensions     108 x 58 x 16.8 mm
Weight     129 g

Display    
Type     TFT touchscreen, 65K colors
Size     240 x 320 pixels, 2.8 inches
     - Handwriting recognition

Ringtones    
Type     Polyphonic (40 channels), MP3
Customization     Download, order now
Vibration     Yes

Memory    
Phonebook     In shared memory, Photo call
Call records     Yes
Card slot     microSD (TransFlash), buy memory
     - 64 MB RAM, 128 MB ROM
- Texas Instruments OMAP850 200 MHz processor

Data    
GPRS     Class 10 (4+1/3+2 slots), 32 - 48 kbps
HSCSD     No
EDGE     Class 10, 236.8 kbps
3G     No
WLAN     Wi-Fi 802.11b/g
Bluetooth     Yes, v2.0
Infrared port     No
USB     Yes

Features    
OS     Microsoft Windows Mobile 5.0 PocketPC
Messaging     SMS, MMS, Email, Instant Messaging
Browser     WAP 2.0/xHTML, HTML (PocketIE)
Games     Yes, special offer
Colors     Silver, Black
Camera     2 MP, 1600x1200 pixels, video(QCIF)
     - Built-in GPS receiver
- TomTom NAVIGATOR 6 software
- Pocket Office(Word, Excel, Outlook)
- Java MIDP 2.0
- FM radio
- Voice memo
- MP3/AAC player
- Video/audio album
- T9
- Built-in handsfree

Battery          
Standard battery, Li-Ion
Stand-by     Up to 200 h
Talk time     Up to 5 h

Review:

It run's better than my exec and as long as you dont fill the internal memory your find it runs great!!! I have managed to freeze mine but that was because i filled the internal memory and when i cleared some space it was running great again!!! ...

Source:
http://www.gsmarena.com/