Palm (of smartphone and PDA fame) hooked up with Bono this week (or at least an investment company he's involved in) and agreed to make lots of sweet money together. Which got us thinking? If celebs are finding they've got so much extra cash they can afford to invest serious dough in our favourite electronics companies, who should be talking to who? We've put together our Top 5 business partnerships to watch out for. Nintendo and Nelly FurtadoHave you seen ...