Update: see latest article Publishing Flex applications to Google Code SVN repository
If you are hosting or contributing to an open-source project on code.google.com using SVN as source control, there is small trick to render .html source files as HTML and not raw text (default). Make sure you set the following SVN property for each file:
svn:mime-type "text/html". I find this quite useful for showing examples or demos (using it for Flash/Flex).