-- A few side notes to Sirius XM's Q1 earnings release on Tuesday, which was reported at Billboard.biz. First, the company lost 306,000 retail subscribers during the quarter - slightly better than the loss in the prior year period. But it gained 461,000 OEM subscribers related to new car sales. In all, the company had a net gain of 171,000 subscribers, bringing its total at the end of Q1 to 18.94 million. Most of those gains came from promotional contracts related to new car ownership. The company had positive net income of $4.4 million during the quarter. Net cash used by operating activities was -$38 million and net cash flow was -$115 million. (Press release)

-- In March, Facebook and Twitter posted annual gains in unique audience of 69% and 45%, respectively. Facebook ended the month with a U.S. unique audience of 117.1 million. Twitter's unique audience was 20.1 million. MySpace's unique audience dropped nearly 25% to 42.1 million. On a global level, social networking sites' unique audience rose 20% to 313.7 million while the time per person shot up 69% to 6 hours. (NielsenWire)

-- iTunes UK and iTunes Ireland have combined to form iTunes UK and Ireland. That means Irish customers will see iTunes pages made for the UK and Irish markets instead of the page made for the pan-European Union audience. In addition, a release can now be featured in the UK and Ireland store without being available in all 13 markets of the pan-European Union store. (Daily Rind)

-- App store analytics firm Distimo has some helpful stats on iPad and iPhone apps. As of April 26, there were 4,870 iPad apps for sale at the iTunes App Store. With 32% of the titles, games is the biggest iPad app category. The average iPad app cost almost a dollar more than the average iPhone app -- $4.67 to $3.82, respectively. Medical ($42.11) and Finance ($18.48) are the two most expensive iPad app categories. (Distimo)

-- Three sets of amicus briefs have been filed in support of Universal Music Group's appeal of a court's grant of safe harbor to online video site Veoh: the RIAA (joined by the NMPA, NBC Universal and AFM), ASCAP and BMI, and the Washington Legal Foundation. "If upheld," reads the RIAA's brief, "the decision would effectively immunize broad categories of infringing conduct on so-called 'user-generated content' ... sites and other file-sharing website businesses like that operated by defendant Veoh Networks, Inc. ... simply because they also happen to perform some storage functions...The decision of the court...would permit conduct on the Internet that would never be lawful in the non-Internet world, including conduct inimical to copyright owners' basic rights, which Congress intended to protect." (Copyrights & Campaigns)

-- We7 CEO Steve Purdham on the music streaming site's timeline to reach profitability: "We are looking for that to happen ideally before the end of 2010 or first half of 2011 at the latest." Last week, the company announced its streaming-related costs were for the first time completely covered by advertising revenue. (Hypebot)

-- Vevo has hired two new members for its sales team. Michael Iantosca will be based in New York and head the New York, Chicago and Detroit sales offices. He was previously VP, digital ad sales at MTV. Luke Kallis will oversee West Coast sales. He was previously executive director of entertainment sales at MySpace.