The Leo is fast becoming HTC’s latest worst kept secret. Pics and video are popping up everywhere with the latest set giving a full visual walkthrough of what appears to be TouchFlo 3D 2.6 riding Windows 6.5. Even better, ai.rs blog claims that Leo is indeed capacitive — something strongly suggested by the multi-touch video leaked a few days ago — and not some fancy resistive touchscreen tech. We’ve got backside action now too, sporting a big “HTCPRO.Three” stamp we presume heralds Pro3 branding whenever this 1GHz Snapdragon handset launches. But man, that 4.3-inch, 800×480 display’s looking positively massive next to the 3.2-inch version found on the Touch Diamond2. Check the back after the break.

Update: Video showing Leo’s very snappy, finger-centric UI added after the break.