Hi Craig, - Brilliant!!
That has done it - exactly what I needed. My client just needs to write the new blog post, tick a box to select it as a 'Site News Item' and it appears on the Home page. Any other blog posts (not so selected) get listed as normal in the 'Quick List' section!
Big thanks to you guys (I will also be investigating SimplePie, as I expect to do considerably more WordPress integration in the future, and it seems like a great resource!)
Owe you both big-time.