Tuesday’s Music 2.0 Briefing: DOJ Approves XM/Sirius, Imeem Opens & Much More

> The XM and Sirius merger has been approved by the Department of Justice.  FCC approval seen next. (ars)

> Thumbplay will power mobile sites for Clear Channel Radio. (press release)

> Gibson Guitars has filed another lawsuit against the creators of the Guitar Hero game claiming patent infringement. (AP)

>Music social networking site Imeem has launched a more open developer platform. (ReadWriteWeb, paidContent)

> Top 10 Reasons you’re not headed to Miami for Winter Music Conference 2008. (Daily Swarm)