GMacSpark

Take a look at twitterfeed.com – I haven’t tried it yet, but it claims to post from your WP blog to Twitter and Facebook…

Thank You!
I hadn’t done that – solved my problem.

Many thanks for the responses!

@tm3909 – I completely take on board what you’re saying about the beauty of managing all the sites through one Super Admin master interface. Unfortunately, if I’m completely honest with myself, I don’t think I’m really up to the task of installing and maintaining a WP Multisite project (I’m definitely not a developer – more of a “geeky creative”).
I certainly see the elegance of the system, though, and, who knows, if the venture grows as I hope it will, I may be able to hire a developer to implement WP Multisite sometime in the future. ;^)

@ipstenu – I’ll definitely take a look at using custom themed template pages to pull in specific categories. I think that may be a solution for the Shownotes page, but I’d like the Blog page to have full blog functionality i.e. ability to take comments etc., which I’m not sure would be possible by diverting posts to a custom page. (?)
Another thought: If I can divert certain posts by Category to, say, the Shownotes page, is there any way to prevent WP from showing those posts on the main blog page? (i.e. they ONLY show up on the Shownotes page, not the Home page).

Again, much appreciated for your time and thought!