Hey mate,
Thanks for the support.
But gee, i'm confused. I just went to find the permalink and found, instead, that it's now working - that is, the display (the summary as you correctly assumed) is now displayed where the shortcode is pasted in the document.
I'm not sure what I changed. The post was originally set to private and not to be published until 2012. I changed these so you could view it, but when I changed them back it still works. The only thing I can think of is that I only just - today - upgrade to WP3.1 - so perhaps that fixed the problem...
WHatever the problem is, it now works... thanks heaps anyway - and my apologies for wasting your time!
regards