A few tips on what to do and what not to do to build community web sites – from the Web 2.0 Summit in San Francisco.

The W3C has proposed a draft standard for “widgets” which, if adopted, would allow widgets (small desk top or web applications) to run in any environment. Currently Google, Yahoo!, Microsoft and Apple all have their own standards.

Advertising Age on how to make money from video in a Web 2.0 world.

602 Communications has posted a short Flash video showing how journalists can use bookmarking site del.icio.us to research their beats.

A new memetracker called Buzzfeed has been launched. It is tracking 50,000 sources.

Steve Rubel is calling for a trusted third party to develop a star rating system similar to that used by Ebay to help combat the gaming of user-promoted sites like Digg following an incident where a fake Reuters story was posted.

Cogmap is a kind of wiki for organisations. It allows user-created and updated organisation charts for any organisation to be created and edited. Already there are a large number of companies listed.

Co.mments is a site which allows you to track comments you leave on blogs around the web. It will notify you when anyone responds to a comment you have left.

Online revenues hit $4.2bn in Q3, up 33% on the corresponding quarter in 2005, according to latest figures from the IAB and Pricewaterhousecoopers. Via John Battelle.

Google Calendar has added a feature to allow users to search for public events.