Thanks Dave, I didn't know about package subtyping, that will be very useful at keeping site-specific hacks out of the main packages. I'll check it out.
No new sites, just moving/upgrading some old ones. The most recent oacs site I did was a few years ago, a full ecommerce site for a store that is unfortunately now defunct (no fault of the online store :).
In fact I haven't done any real web development for some time. I'm predominantly Mac and iOS these days, although wouldn't mind getting my teeth back into some nice web stuff at some point.