[ietf-dkim] Fluffy DKIM questions

[Steve Atkins]

As a distraction from the deeply technical stuff, I have
some PR / deployment related questions. I'm looking
for answers that are suitable for a user intending to
deploy, rather than a developer intending to implement.
I'm also talking solely about dkim-base, not about any
of the bags on the side.

1. Does anyone have an overview of the benefits and
     drawbacks to DK and DKIM in general?

2. How about the differences between DK and DKIM?

3. Is a valid DK signature a valid DKIM signature?

3b. If the general answer to that is "no", are some subsets
     of DK signatures also valid DKIM signatures?

4. What are the Intellectual Property implications of
     deploying DKIM? (The Yahoo DK license agreement
     has scared off a number of people from implementing
     or using it).

I think I know the answers to some of these, but I
thought I'd throw them out here anyway.

Cheers,
   Steve