Paul sez, "Lingro lets you enter any webpage and make every word clickable for a translation (Boing Boing for example). There's a bookmarklet for handy access, and a simple search-as-you-type dictionary that is faster than any multilingual web dictionary out there.
"It works with English, French, Spanish, Italian, German, and Polish (with more on the way) and if you find a missing word, you can add a definition.
"Our goal is to make the coolest language learning tools, build community, and build open content dictionaries that anyone (even our competitors) can use in their projects (licensed under the FDL and Creative Commons licenses)."
The use-case here is people who are pretty good at reading another language, but get stuck on the occasional word (I'm this way with Spanish), but more importantly, the project builds on and releases free and open multi-lingual dictionaries, which are long overdue. Link (Thanks, Paul!)
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.