-- This does not mean that people aren't going to discover and then purchase songs at sites like MySpace or Imeem, but this study on grocery shoppers' unplanned purchases may make you rethink how many of those affiliate sales were actually planned purchases that would have happened eventually. Wharton marketing professor David R. Bell and two colleagues found that unplanned buying was about 20% of total purchases, a level far under what is typically believed in retail and marketing circles. No unplanned buying occurred on nearly 60% of shopping trips. But, grocery stores are not online music services. The study offers two strategies: do more with existing customers or target those more likely to make unplanned purchases. (Knowledge @ Wharton)

-- In case you missed this item in Billboard's interview with CBS Interactive Music group president David Goodman: about 7% of Last.fm's audience is now streamed through an iPhone. (Billboard)

-- Digital Audio Insider's latest Last.fm royalties statement hints at a sizeable improvement in the service's net revenue (which is the basis by which royalties paid are determined). That could imply a big improvement in ad revenue. (Digital Audio Insider)

-- Speaking of Last.fm, it unveiled a new web-based music player that incorporates a slideshow of artist images. (Music Machinery)

-- On a note related to ad-supported streaming services, Rupert Murdoch has claimed the era of free online media is over. It's not about unique users, he said, but the value of the users you attract. "We're not going for the Facebook model of getting hundreds and hundreds of million of people who don't bring any advertising with them at all," he said of News Corp's interactive media division (which includes MySpace). (The Guardian)

-- Live Nation and Anheuser-Busch have renewed their sponsorship agreement for another three years. The summer of 2009 will once again witness Budweiser's "Ticket to Summer" and Bud Light Port Paradise promotions. And, of course, Budweiser is the exclusive beer sponsor to some Live Nation amphitheaters around the U.S. (St. Louis Business Journal)

-- This year's Digital Hollywood conference is a bit light on music. "The name tags at Digital Hollywood show the distress - some have company names scratched out, others merely list the person as 'former' or the head of a one-man consultancy. Many attendees are poking around for gigs." (Digital Music News)

-- Two consumers in New Jersey have brought a suit against Ticketmaster for redirecting them away from Ticketmaster.com to higher priced ticket at TicketsNow.com. (NJ.com)