Add mention of project summits/subconferences

git-svn-id: https://svn.apache.org/repos/asf/concom/site/trunk@1856073 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/content/about/apachecon/index.mdtext b/content/about/apachecon/index.mdtext
index 1f39221..866d037 100644
--- a/content/about/apachecon/index.mdtext
+++ b/content/about/apachecon/index.mdtext
@@ -31,15 +31,19 @@
 While ApacheCons vary from year to year and location to location, there
 are some components that you can count on happening at every ApacheCon.
 
- - ApacheCon has at least 4 tracks of technical content, and often more
+ - ApacheCon has at least 4 tracks of technical content, and often more.
+ - Projects, or groups of related projects, may request a dedicated
+   track where they will provide a track chair, and have freedom to
+   create their own content for a project/topic sub-conference. In this
+   way, ApacheCon resembles a convention of Apache project conferences.
  - There will be a hackathon space where projects can gather to work on
-   code, or work out community issues
+   code, or work out community issues.
  - There will be a **State of the Feather** Keynote by the President or 
-   other officer, providing an overview of the ASF's accomplishments
- - There will be a PGP key signing
+   other officer, providing an overview of the ASF's accomplishments.
+ - There will be a PGP key signing.
  - An Apache BarCamp will held, typically on the day before or after the
-   main event
- - The event is usually 3 days or more
+   main event.
+ - The event is usually 3 days or more.
 
 ApacheCon is the one annual event for the particular continent in
 question. As such, it draws an international audience, both in