UPDATED 4 September 2015 to include automated daily briefings
I've just made it easier for anyone interested in viewing and sharing METAR/TAFs, NOTAMs, and Route (Google) Maps on Twitter. Basically, I've built a simple web-app wrapper around the existing iNavCalc Twitter App. The wrapper does most of the work for you. You can find the app here, and it looks like the screenshot below (usage self-explanatory, especially if you've read this):