More news is floating downthe mountain tonight, in regards to Sumner Redstone's announcement this afternoon that he's thinking about dissolving mega-conglomerate Viacom into smaller parts. Variety is now reporting that the chairman-CEO wants to split his media empire neatly in two. One company would be headed by Leslie Moonves, and would include CBS plus radio and outdoor advertising; the other, to be led by Tom Freston, would include MTV, Paramount, and most of the rest of what is now Viacom's entertainment division. The idea is that the two companies would be so different - the latter would be focused on risk-taking and growth, the former, on a fairly stable notion of value - that they would attract two totally different types of investors. This, of course, is still all "hypothetical" - all Redstone would confirm today is that he has authorized "exploration" on the matter.