English has Shavian.
There's also Deseret, which I've made some tools for, but it's not featural (beyond some isolated cases, like ligatures for some-but-not-all diphthongs) and is somewhat confusing to learn.
Neither of these will be generally usable for the immediate future, since they're both in Unicode's astral planes, and some common piece of web framework (old versions of MySQL, IIRC) silently fails on encountering astral-plane characters. Font support is another issue, but Deseret is slightly better-supported than Shavian -- my Win8 install came with a font for the former, but not the latter.
(If there's anything after the following colon, LW doesn't have this bug: 𐑄𐐮𐑅 𐐮𐑆 𐐩 𐐻𐐯𐑅𐐻)
If you wanted to use them you could build Chrome and firefox plugin that automatically parses all English text into Deseret. At the same time you could write a wordpress plugin that automatically offers users under des.domain.name a version of the website in Deseret.
I just read this in the Wikipedia article on the Mattaponi River and it really tickled me. If only all language were so rational!