I have noticed Google does not index the archive pages. Probably the contents of the url after the "index.php/" are ignored by Google. I have made a rewrite rule trying to overcome this.
RewriteRule ^arc/(.*)$ archive/index.php/$1 [L]
All I need to do is including the above to my existing rules, and find "footer" template, change "archive/index.php/" to "arc/".
Nothing else needs to be changed.
The actual url for Google to see will be:
http://www.mysite.com/arc/f-40
etc. Now if Google does not index this, I don't know what would they index.
(I am using v3 Gamma at the moment).