Our Back Bay friend Penny Cherubino writes and maintains one of the best websites in Boston,  For those of you unfamiliar with this treasure, log on right now (and I mean right now) and add it to your favorites list.  The June 1 blog shows a photograph of an elm on the corner of Commonwealth and Massachusetts Avenue suffering from Dutch Elm disease.  Penny has a number of enthusiasms – dogs, gardens, farmer’s markets, living well (sustainably), and you will find so much valuable information here on people and events that you’ll wonder how you did without the source.  Beautiful photographs, book recommendations, current affairs, music – there is something here for everyone.  Brava, Penny!