Alyssa Goodman's "Desk"

Basecamp (is easier for straightforward project management than a Wiki)

Many of us use wikis, or Google(-like) Docs/Sites, to collaborate with each other, and those are great in many cases.  BUT, when what you want is to robustly manage the activities of group of people who collaborate both with each other and with other groups of people, in a secure and simple way, Basecamp is hard to beat.  The hard part is the cost.  This is not a free service: it will cost someone hundreds of dollars per year to use. The trick is to get your institution (or group leader) to decide this is worth it—and then use it.  

Notes on features: 1) Basecamp allows for all communication to flow through it, even if responses are only through email—as long as the original message of a thread was started on the project site (thus, people won’t complain as much about having to go to a web site to send a message).  2) Files can be directly uploaded, and/or attached to messages. 3) Excellent calendaring/to-do/reminder systems are built-in and easily integrated with other apps. 4) Collaborative document editing is possible through “Writeboards,” but these are NOT as powerful as a Google Doc, so beware. 5) Permissions can be easily managed across projects, and administrator privileges can be distributed.

URL: http://basecamphq.com/