Hi Alex!

Since only one view will 'exist' in the new version

We'll see. The ponit is: I don't have a need for the "board view" and at the moment I don't feel like doing it.

I will not miss it either

... but maybe a robots="noindex" in all pages except for the index page and the opened messages might also be beneficial.

Oops, please as an option only (if at all)!

What I ment was to allow indexing the index page and the entries. Everything else (complete thread (double entry), login, register page etc.) shouldn't be important to Google or am I wrong?

Double content is only an issue if multiple views are possible. Even as I have added rel="nofollow" to many links, Google still gives them a quick gaze.
Just an example from my server-logs
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html) *g
/forum/board_entry.php?id=675 (<- this is fine)
/forum/contact.php?id=675&page=0&
category=all&order=last_answer&view=mix (<- this is stupid and considered double content)

P.S.: Pasting of the emoticon is not working (maybe the same error like in versions up to 1.7.1)
P.S.: What is the maximum word-lenght?