Wordoff applies the following rules to strip the cruft that is pasted into WYSIWYG editors from Word:
Attributes are removed for all elements except ss and s are removedEmpty elements are removedConsecutive line breaks are reduced to two
Drag and drop your truetype (ttf), opentype (otf), scalable vector graphics (svg) or Web Open Font Format (WOFF) fonts in the left hand side module and it will be added to the list. The last font dropped will change the font-family of this text and the above title.
At the moment this functionality of dragging and dropping files from the desktop to the browser is only available in Firefox 3.6. You can expect to see this added to other browsers in the near future.