SPF vs SenderID?

[John Allen]

The jungle drums has been rumbling about SPF2, as a result I started to 
do some reading up on the new "standard".

So far I seem to have found two camps those for it and those against.
From my reading to date those against seem to "winning".
    It appears to be a Microsoft experiment,  is this true? if so 
should I ignore it (at least for now)?
    The "standard" has NOT been adopted. again is this true?
Bottom line should I be working on implementing sender-id?

JohnA