• New Island Urban president Jermaine Dupri has signed Jagged Edge to his So So Def imprint. Island Urban itself signed California rapper Hot Dolla. (Billboard.biz)

• Sirius and XM executives were questioned by a Senate anti-trust panel yesterday. Questions about market competitiveness rest on whether or not satellite radio faces competition from local terrestrial radio stations, or if its a market unto itself. While no single terrestrial radio station is in direct competition with XM or Sirius, I think consumers view satellite and terrestrial as substitutes -- and anti-trust regulators should take the viewpoint of consumers when assessing the merger's impact. (Forbes.com)

• A court rules that TVT Records must pay Slip-N-Slide $9.1 million for blocking the release of an early Pitbull release. (Vibe.com)

• Borders may sublease four Chicago-area stores as part of a cost savings strategy. The company, which has an earnings announcement tomorrow, has issued a profit warning due in part to sales declines in the music category. (Chicago Tribune)

• Career announcements are a dime a dozen, but this one stands out for an obvious reason: Koch Records has named Scott Givens as its new VP of metal. That's gonna be one sweet business card. (Billboard.biz)

• Albums on flash drives may (or may not) shake up the pop charts. HMV stocked 7,000 flash drives for the new Fratellis album. Hey, if it works, the industry has a new format to milk for a few years, and they'd probably be more than happy to sell protected files in a physical format for a change. (BBC News, via The Velvet Rope)

• Oddity: At one point yesterday, Amy Winehouse's Back To Black was both the #1 and #10 album at iTunes. (iTunes carries both the explicit and clean versions, and both are currently priced at $7.99.) Another SXSW buzz band, The Fratellis, was also in the Top 10.