Since I cannot post in the announcement for Briefcase sticking around, I have found this to be the most appropriate location. Sorry if it is not.
Last time I looked I had to use WebDAV to connect Briefcase to external network stores.
One thing I really need the Briefcase to be able to do is connect to various network storage protocols such as NFS/SMB/SCP/SSH, etc. I love Zimbra and I feel this is a big gap in it's ability to integrate into my business' infrastructure.