Recently, Colligo Networks as an offline collaboration solutions providers for mobile workers, released a brand new product called Colligo Reader for SharePoint which is currently a Beta version. You can download this tool for free and use it to get a Read Only access to you site's content (not your site) offline.
Colligo Reader connects to a SharePoint WSS or SPS server using standard web services and site permissions, then downloads the content to a local file store on the Windows® file system which preserves document links. It provides support for most SharePoint content that is commonly used, including the following:
- Document libraries: includes form libraries, metadata and views
- Lists: custom, issues, contacts, events, announcements, tasks, links
Colligo also announced for another product called Colligo Contributer, by which you can edit the site's content offline and synchronize it as you get online.