ElecktricForest has published a nice visual chart comparing all of the currently available Windows Phone 7 mobile devices. UPDATE: You can see our more detailed chart here: Windows Phone Handsets Comparison Chart.

The Windows Phones being compared here are:
Dell Venue Pro, HTC HD7, HTC 7 Mozart, HTC 7 Pro, HTC Surround, HTC 7 Trophy, LG Optimus 7, LG Optimus 7Q (Quantum), Samsung Focus and Samsung Omnia 7.
Whats being compared here is:
Width, weight, height, ROM, RAM, Thickness, camera specs, Battery & Screen.
ElektricForest. You can also see our more detailed chart here: Windows Phone Handsets Comparison Chart.
Quite useful to see all these in one image!
If you have liked this post, you might want to check out some more, on topics like Handsets, Smart Phones, WP7.