Block "Important Papers" is at footer of the page "http://mcm.lternet.edu/mcmurdo-dry-valleys-lter-research". The block shows first five papers tagged as "important" with a link to a list of all those papers.
Seems sufficient, but would need to check whether this is OK with the rest of the group --
--moving this one up.---
Tag Important papers appropriately (other biggies, climate response, legacy) in order to make a view of important papers.
You can use filters here http://mcmdev.lternet.edu/admin/content/node