Will Time Warner get $15 billion for a split-up AOL?

The Wall Street Journal (subscription required) reports that BloggingStocks' parent -- Time Warner (NYSE: TWX) -- is almost done with the work of separating AOL's 8.7 million subscriber dial-up business from its advertising one. And Earthlink (NASDAQ: ELNK), with 3.3 million subscribers, appears to be the logical partner -- particularly if it's willing to pay more than the $2 billion to $3 billion the Journal estimates its worth.

When AOL announced two years ago that it was going to get out of the Internet access business and focus on advertising, I wondered how it would come up with the roughly $2 billion it would lose from the plan to give away all of AOL's content and services to subscribers who don't use AOL for dial-up access. The plan was to replace that cash flow with advertising sales. But the most recently available comparison shows that AOL's revenue has declined 43% from $1.981 billion in Q1 2006 to $1.128 billion in Q1 2008. A 64% drop in subscription revenues to $559 million was not offset by the 41% increase in advertising revenues to $552 million.

Still, I think the idea of combining AOL's shrinking dial-up business unit with Earthlink could benefit Time Warner and yield some cost savings that would boost Earthlink's cash flow.