WMPoweruser.com

B3ler3fonte has leaked the full official specs of the HTC Leo on XDA-Developers and it reads as below:

Platform
Ultra slim bar type touch phone / Windows Mobile 6.5 Professional
Processor/Chipset
Qualcomm MSM 8250, 1GHz
Memory / Internal Storage
ROM: 512 MB / RAM: 320 MB / HD: 207.13MB
Display Module
4.3-inch 480×800 WVGA resolution / 65K-color / Sensitive touch screen (Capacitive) / Keep support Multi-Touch capability for WM7 Chassis
HSPA/UMTS/EDGE/GPRS/GSM Function
Internal antenna
HSPA/UMTS 2100/900 MHz and GSM/GPRS/EDGE
Quad-band (850/900/1800/1900 MHz) / HSDPA / 3GPP Release 5 compliant
Up to 7.2Mbps / HSUPA / 3GPP release 6 compliant / UE category 5, up to 2 Mbps peak rate / EGPRS Functionality / EGPRS class B / Multi-slot class 12 (10 Operator dependent) / PBCCH
Standalone GPS
Internal GPS antenna
Sensors
Motion G-sensor / Proximity sensor / Ambient Light Sensor / FM Radio
Digital Camera
Main camera: 5 MP Color CMOS with auto focus / 2x LED flash
Key/Button/Switch
Volume up and down control / Send Key / End Key (Power Key) / Windows Key / Home Key / (Cinema mode Key, TBD) / Back Key / Reset
Notification
Notification by sound, vibration, LEDs or status shown on the display
One dual colors (Green and Amber) LED in the left / lens for PDA event, battery and charging / status
Audio
Built-in microphone / Receiver / Loud speaker with hands-free support
Connectivity & Interface
Bluetooth / Version 2.1 compliant with EDR / Wi-Fi / IEEE 802.11 b/g compliant / Micro-USB: / USB 2.0 High-Speed client / 3.5 mm stereo audio jack with mic / 1.8/3V USIM/SIM card slot / microSD card slot with SDHC support
Power
Battery / Removable and chargeable battery, 1,230 mAh / AC adaptor / AC input: 100 ~ 240V AC, 50/60 Hz / DC output: 5V and 1A
Accessories (In-Box)
Quick Start Guide [Inbox] / Travel Charger, TC P300 [Inbox] / USB Sync Cable (Micro-USB to Standard USB) [Inbox] / Battery [Inbox] / Wired stereo headset with 3.5mm audio connector, HS G335 [Inbox] / Premium pouch (Carrying Case) [Inbox] / Car Charger [optional] /Car Holder with battery cover [optional]
Microsoft Windows Mobile 6.5 Professional Applications
Microsoft Outlook Mobile / Messaging (SMS/E-mail), Contacts, Calendar,Tasks, Email Set Up Wizard / Microsoft Internet Explorer Mobile / Microsoft Media Player Mobile / Microsoft ActiveSync / Microsoft Windows Mobile Update / Internet Sharing / Pictures & Videos / Games / MSFT Zip
File Explorer / Device Management / Security Enhancement / Microsoft Office Mobile / Microsoft Windows Live! / Microsoft Smart Dial / Microsoft Remote Desktop Mobile
Value-Added Applications
Windows Mobile Enhancements / Pictures & Videos enhancements / Ring Tone enhancements Telephony (HTC) Phone Canvas(HTC) Phone Experience Multimedia / (HTC) Camera Album / MP3 Trimmer / Streaming Media Player / FM Radio / Presentation mode / Web / Push Internet / RSS HUB / YouTube Client Social Networking / Input Method EZ-INPUT / Messaging SMS/MMS Client / GPS/LBS Navigation (CoPilot, Papago) / Google Maps / Quick GPS / Support CLL.dll library for indoor positioning and reverse geo-coding / Navi-panel / Calendar to Navi / User Interface (Enhanced Manila) / TouchFLO Footprints / Auto Screen Rotation /
Tools & Utilities
HTC Common Sense / 3G to WiFi router / Task Manager / Text selection (HTC) Connection Setup / OOBE / Voice Recorder / Document Viewer / PDF / OMA DRM Engine / Java virtual machine / Long Press / End Key Confirmation (to shut down) / STK SIM manager / (HTC) Volume Control / Business Card Reader / Document Printing / Magnifier.

See the original list here.