UK-based Huddle, an Enterprise 2.0 startup which is now clearly positioning itself square-on against Basecamp, launches a well-featured Facebook application at the DEMO 08 conference this week. The Facebook integration will make your boss think you are working even when you’re on Facebook – as it allows full access to all Huddle’s tools [update: the app launches Wednesday] . And the new Huddle Desktop application will let you drag and drop new documents between the desktop and Huddle’s service. Also included is OpenSAM Integration where you create, view and edit documents in Word, PowerPoint and Excel within Huddle through embedded Web Office tools from iNetWord, EditGrid and Preezo.

The free version of Huddle includes three team workspaces, one Gigabyte of document space and unlimited team members (Basecamp doesn’t go this far on either count storage). After that there are more paid-for options. In November last year Huddle announced $4m in series A funding from Eden Ventures in London. Companies using Huddle include Reuters and PR group Edelman and UNICEF. Competitors include Centraldesktop, Weboffice, Projectspaces, Wrike and Goplan.