Confluence 4's import path is supposed to be MS Word, but there are several bugs that make it unusable: cross-references are broken, numbers are converted to plain text instead of ordered lists, and each node of the TOC is sorted alphabetically.
I think Atlassian is in a catch-22 as regards the tech docs market: they don't fix those bugs or support bulk import because not enough of their users are voting for those bugs or enhancements, and not enough users vote for those because it's too hard to migrate legacy content, so tech docs departments are not using Confluence. WebWorks can export a whole FrameMaker book to Confluence, breaking it up into pages the same way it does for online help. It works fine with Confluence 4 for read-only purposes but it doesn't create the XHTML source you'd want for migrating permanently.
