Why is Nextel's Donahue selling his shares?

Nextel might be in talks with Sprint, but Chief Executive Tim Donahue is not waiting for his pot at the end of the rainbow. He has been like most other insiders selling his shares in Nextel for most of the year, and his total take is more than $32 million. Actually if you saw the insider sales, you knew something was up … the insiders were perhaps not feeling too confident about the future of the company as a standalone entity and perhaps it should have been a tip-off for rest of us? Hmm?