Twitter is officially four years old today, as of 12:50 p.m.
I learned this, appropriately, from a tweet this morning. Twitter has been responsible for a number of smiles as I've followed people through the last three years, and the application has given me grist for blog posts.
No Overheard on Twitter today, just a hearty congratulations.
Next time: those library tales I mentioned on Wednesday. Stay tuned.