Demo sessions are an hour long.  Here's a starting suggestion: 

15 minutes: Intro to Galaxy and the Galaxy Community

3 x 15 minutes on 3 specific Galaxy servers.

The intro would be presented by someone who is not doing one of the subsequent 3 presentations.  The possible catch is that demo sessions cost €400.  However, the Galaxy Project has some funds that it can contribute to defray the session costs.

So, if 

• you are have a European based publicly accessible Galaxy server, 
  
• and you would be interested in presenting it at an ECCB demo session,
  

then please let me know off-list.  I'll bring everyone who is interested together and we'll see what we can put together.

Thanks,