[support] manage and cross-link multilingual content

[dondi_2006]

Hello,

I have found these two pages:

http://drupal.org/node/43676
http://drupal.org/node/5253

but they don't seem to address exactly my problem.

I want to have a bilingual site where, besides having
one interface (menus, site map etc) for each language,
any single article:

1) can have both an english and an italian version, or
2) full version in any of those languages, summary in the other
3) the two versions of each article, be they full or
   summaries, automatically link to each other

Thanks in advance for any feedback,

Ortles