Getting things into confluence can be expedited by using one of these automatic converters. Often the converters do a decent job of converting the bulk of the content and you only need to tweak here and there. Many of these converters are meant to be installed in Word or Excel and not Confluence itself.

You'll find a current list of converters for Word, Excel, HTML and other formats at the Confluence website:
http://confluence.atlassian.com/display/CONFEXT/Content+Converters