I quite like the idea of singing/magic skills. It'd be especially nice if they could sing and play guitar at the same time, as a lot of people do that in real life. I'm not so sure on the social aspect though. If it's linked through Facebook I know I won't be using it, as I have a lot of work people on there and I'd be worried they'd take it as me playing Sims and not working on their projects.
That said, I won't be buying it until I can get hold of WA, LN and Pets to complete my collection so far.