RIP Sender ID. Long Live SPF? Death to spam!

Microsoft's greed and stupidty has killed Sender ID. I suspect that SPF won't die tough - it has a lot of supporters. It won't solve the spam problem either - not even by a longshot. Neverthless, it is a step in the right direction. The only way to stop spam is to make it unprofitable. Right now there isn't a single measure or technology that can do that. So what? Why not implement several measures and technologies to do it.
SPF, Bayesian Filtering, Blacklists, Whitelists, etc. More about this later.