I never really paid much attention to the online music space but Apple's acquisition of Lala made me look around. Everyone assumes that Lala's deals with the record studios and Google will self-destruct due to change of control clauses in those contracts. Why would Apple buy them?
Just compare the sharing/embedding features offered by iTunes and Lala and think about which version you are more likely to use on twitter or embed on your blog. Clearly the Lala engineering team thought about how to do this, whereas the iTunes version is a typical implementation by a large company that felt it needed to check the "social media integration" checkbox. I am looking forward to seeing what these guys will do inside Apple.