[CentOS] OT: Web "Project" type software

Sorry for the OT... I'm looking for some software to fill a fairly
specific set of requirements. I'm not necessarily looking for project
software, but it seems like the closest to match what I need. I'm also
not tied into open source or free. If anyone knows of any software that
might fill these requirements I would appreciate it. 

Here's what I'm looking for:

1) Web enabled application
2) File storage
	- need to stare a large amount of large cad files
	- be able to categorize file storage (not one large list)
	- keep different revisions of files with some kind of notes
	- be able to search files (at least include names in a search)
3) Task	- assign and keep track of tasks (searchable)
4) Store meeting notes and minutes (searchable)
5) Would like to support LDAP
6) Extension on file storage - since we'll be storing a large files and
many of our users are across a WAN we'd like to sync/mirror the files to
a few different servers. I'm not sure how we'd control how the users get
the "closest" server but....

I found dotproject on sourceforge. It fills some of the needs, but it's
file storage appears to be one large list, doesn't appear to support
LDAP, and I don't see much for searching. 

Anyone know of software that might do these things?

Thanks,
James