Last May, it was reported that Curtis Jackson, the rapper better known as 50 Cent, cashed in his 10 percent share of Vitamin Water manufacturer Glaceau to the tune of a staggering $400 million. (Coca-Cola bought the company for $4.1 billion). Just last week, a rep for the company actually told us that 50 only ended up making a small fraction of the quoted sum, but it now seems that his name is being attached to another insanely speculative rumor: according to reports, 50 is on the verge of signing a $300 million "branding deal" with Rupert Murdoch's MySpace.