By far, Silverdict is the best looking dict app I've tried, WP7 or Android. The design is clean, polished and intuitive.
The "tab" design is a very useful idea (2nd picture OP). I usually use 3 portuguese dicts on Fora Dictionary (Android app). When I begin to write a word on it, various suggestions appear (of all 3 dicts). In Silverdict it's a little bit different, it's more individualized: you write a word on textbox and the results aren't displayed all together, but in each dict's tab. It seemed to me as a flaw at first, but now I really like your design option sensboston.
EDIT: after playing a little bit more with SilverDict, I find to feel that it would be more intituitive if when I tap a word all dicts display it's meaning. As it is now, each time I select a tab I have to tap on the word to display it's meaning, even if I have tapped it before.
Fora Dictionary has a start scanner function. When activated, if you copy a word on browser or an e-book reader app, it automaticly opens dict app and displays the word's meaning. It's a superb feature, but due to WP7 limitations it will probably be hard to achieve. Besides, WP7 e-book readers I've tried don't have the option to copy a word (can't understand why).
EDIT: with Freda e-book reader, with a 2-step procedure, it's possible to copy a word. Start scanner would be a nice implementation in Silverdict, if possible of course.
Skyfire works great, but I'm having an issue with dropbox. I added my account and it opened dropbox page on browser. Due to "not having jave script" my folders weren't displayed.
Y U FANBOY?