If you remember anyone who used to say that biotech would never amount to anything, now's the time to make the told-you-so phone call. Biogen Idec says it is considering a possible sale of the company, and one of the interested parties is Carl Icahn, who offered at least $23 billion, according to this article in the Wall Street Journal. Biogen Idec has a market cap of about $23.5 billion.