Unless given by somebody like Rory Bremner, a presentation about 
operating systems would be difficult to make entertaining for everybody 
unless they have an interest in the subject. Just concentrate on making 
it interesting for the few who are interested. The list is very 
occasionally entertaining but we read it because it is interesting.
It seems to me there are two aspects to open source that make it 
interesting. It is almost certainly cheaper and can be more reliable 
than proprietary software to do the same job and is (should be) 
therefore of interest to the business community . The other aspect is 
that anybody can see how any software component works, experiment and 
build anything you like and for free.
Aim the presentation at the second group with the message "please try 
this at home". If a few get inspired then job done.
For entertainment you could show 
http://www.snopes.com/photos/people/gates.asp, a pin up of Bill Gates 
seductively tossing a "floppy" (Quick take the picture before it 
crashes) or for top rate entertainment 1 min 30 secs of  
http://www.youtube.com/watch?v=3k0qZDdfvZk (Brian Johnson corpsing) cant 
fail.
The presentation by the two Alans of the open learning centre seems like 
it would be extremely effective. I would go so far to say that it could 
form the basis of an event on Software Freedom Day in September.
It may be feasible to get some sponsorship from our local big OS 
supporter (IBM) to pay for a cup of tea and hire of a suitable venue 
(University perhaps) and perhaps a couple of ads in the Hampshire 
newspapers. It would be up to us to organises and publicise the event by 
getting it into diaries like the Chamber of Commerces, Business Link and 
the apparently countless organisations that support small businesses. I 
can think of a half dozen people from small business, health service etc 
who I could personally invite. Those in business themselves could invite 
their client list and it may be an opportunity for those to spread a few 
business cards around.
If there is enthusiasm for this idea, now would be the time to start the 
ball rolling.
Roger