Hi Andreas thanks for the note.
Yes, the communication to the website developers by the documentation members should be very open and frank. I think the people who are going to put up the Drupal site are very willing to cooperate and to build pretty well whatever you wish, if the capability is there.
I think it is too early to propose two cms's but we should take a look and be critical or each Plone and Drupal and see if both can match what they do and after this see if there is support offered by either one of the CMS's to tweak more for what is best to make your jobs easier. Let's take a look at both so that the best option/decision be made.
I'll encourage the Drupal developers to join the document mailist to make things easier.
BTW ... we are getting more offers for Drupal development help so the help will be there. We have a lot of Drupal development people who are eager to get to work on the Drupal site.
Would you know if there is a lot of Plone developer help? We should also keep this in mind too.
Marc