John Mayer has a blog but the autodiscovery feed on his site captures all the TOUR and band member blogs as well. I'm mainly just interested in his stuff, so I created this pipe to weed out the dreck.

Get an RSS feed if the high temp of the day will be less than your specified value. EXAMPLE: Let your phone tell you that today's high will be less than 40 degrees--consequently you should wear a jacket.