-- How did Rick Astley's "Never Gonna Give You Up" get to the top of the Twitter chart at MP3 blog aggregator The Hype Machine? A single tweet by TechCrunch to its 916,735 followers. (TechCrunch)

-- Research in Motion will launch a music service for BlackBerry in September. The wireless download service, which will be access through a free application, comes via a partnership with 7Digital and will have editorial and features. Tracks will cost $0.99 and albums will cost $9.99. The countries covered by the new service will be the U.S., U.K., Canada, France, Italy, Germany and Spain. (Telegraph)

-- A 15-year-old wrote a Morgan Stanley research note on how teens consume media. Morgan Stanley notes in the introduction the author does not claim "representation or statistical accuracy," though in the report the author implies knowledge of all teens, not just those in his social circle. Here's a blurb from the section on music: "They are very reluctant to pay for it (most never having bought a CD) and a large majority (8/10) downloading it illegally from file sharing sites. Legal ways to get free music that teenagers use are to listen to the radio, watch music TV channels (not very popular, as these usually play music at certain times, which is not always when teenagers are watching) and use music streaming websites (as I mentioned previously). Almost all teenagers like to have a 'hard copy' of the song (a file of the song that they can keep on their computer and use at will) so that they can transfer it to portable music players and share it with friends." ("Media & Internet: How Teenagers Consume Media," via paidContent UK)

-- A brief story on how three music retailers - Rough Trade and Pure Groove in London and Amoeba Music in California - have re-invented themselves to stay relevant. Said Pure Groove's events manager, "We couldn't afford to compete with the likes of Amazon so we became a boutique outlet, basically trying to put the magic back into record buying." (Financial Times)

-- Portable readers, the domain of mostly books and newspapers, are expanding their reach to sheet music. Freehand System's Novato Music Press catalog, over 20,000 songs, will be made available to the Amazon Kindle. (Pocket-lint)

-- Radio revenues for Emmis Communications fell about 27% in Q2 2009. Station operating income was down 67% to $81 million. During the quarter, the company repurchased $78 million in debt for about $45 million. (Radio Ink)