What demos do you want to see

Clives post has got me thinking.  What demos do you really like?  Simple or complex? Short or long?  Wxisting how to stuff, or new unseen things?  We’re starting to plan our TechNet sessions for next year and would like some input about what you want to see.  I know that Mat will be busy with the SQL server launch  but Clive would also like to know what demos you’d like his team to do (just leave a comment on his blog… to tell him)