As CNET points out, it's all about the business ties. U2 lead singer Bono is the most stylish managing director at Elevation Parters, the Sand Hill private equity firm. Elevation cofounder Marc Bodnick is on the board of directors of iLike. Hence, the arrangement. Bonus for close students of the Valley's real social networks: Marc Bodnick's wife is Michelle Sandberg, the sister of Google executive Sheryl Sandberg, who's married to former Yahoo Music chief Dave Goldberg, who's an iLike advisor. Got that?