1. Was Flex 3 based, now Flex 4 based, uses Spring ActionScript, pods in modules
2. Re-arrange dashboard pods via dragging (esria dashboard snap positioning in tile mode), leverages flexmdi subset ported to flex4 (cascade/tile)
3. Pods for document management,search for Alfresco and Adobe LiveCycle Content Services ES2
4. OpenCalais semantic auto-tagging is supported in Alfresco doc mgt pods
5. Web Content Management pod for Alfresco
6. Additonal Flex components for wikis, blogs, discussions, calendar on top of Alfresco Share backend
7. BI / Charting / Reporting (JasperReports Viewer, Pentaho Charts, BIRT Viewer)
8. OLAP / XMLA pivotable grid / MDX query tool
9. Can use data sources configurable / injected / autowired with Spring ActionScript from BlazeDS etc.
10. BPM (JBoss jBPM and Activiti in Alfresco)
11. File drag/drop between pods (and AIR desktop file drag/drop into folder view pods)
12. Pods for Liferay portlets, HTML, local files, etc.

See integratedsemantics.org blog

and integratedsemantics.com.

Also see

FlexSpaces (which FlexibleShare is based on) Google Code site

FlexibleDashboard (which FlexibleShare is also based on) Google Code site

FlexibleLiferay (which extends FlexibleDashboard to be a Flex based Portal Container for Liferay) Google Code Site

FlexibleShare Overview in Alfresco Forum

Download FlexibleShare in Alfresco Forge

Alfresco Download / Wiki