Collaborative highlighting in Google Docs documents

New collaboration functionality has been rolled out in Google Docs. Highlighting of text by each document collaborator is now visible to all collaborators.

For details, see the Google Docs Blog post at http://googledocs.blogspot.com/2010/08/collaborative-highlighting-in-documents.html for details.

New "find a time" feature in Google Calendar

Google Calendar now has a new "Find a Time" feature for creating a calendar event with one or more people. To access this feature, click the "Find a Time" tab in the upper left corner of the Event window.

See Find a time feature - Google Calendar Help for more details and a quick tour. Or view the Google Apps blog announcement. 

Convert files in the Google documents list to a Google Docs format

If you have uploaded files into your Google docs document list, you can now convert these files into Google Docs format by right-clicking on the document. In addition, both image files and .pdf files can be converted to text via Optical Character Recognition (OCR) technology.

See the link below for more information and a list of file types that can be converted.

Source: Convert files in the documents list to a Google Docs format - Official Google Docs Blog