Twitter came into its own in the recent demonstrations in Iran, coordinating protest and reporting on it.  Its everyday uses are more prosaic and even vain but here is another I can applaud: coordinating a countrywide (or even global) wine-tasting.  The Slate wine critic will be tasting the following wines on Aug 26 6.30 (Eastern U.S. time) and encourages others to follow and post on Twitter:

Domaine des Aubisières Vouvray Silex 2007, $16.95
Les Héritiers du Comte Lafon Macon 2007, $21.95
Domaines Ott Côte de Provence Rosé les Domaniers 2008, $18.95
Jean-Paul Brun/Domaine des Terres Dorées Beaujolais l’Ancien 2008, $15.95
Betts & Scholl Grenache O.G. 2006, $24.95
Ruinart NV Blanc de Blancs, $64.95

(FYI: Three are at Binnys for Chicago locals.)