I’m still looking at a WordPress theme as a “standard” for ACO blogs/sites (as well as a little project I have up my sleeve).
Some questions for you:
Which style of theme would suit best - 1/2/3 column?
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Personally I imagine that 3 columns is the best approach, one for twitter feed, main content, and latest news/photos.
Probably the best route would be a standard “Air Cadets” colour theme, so perhaps a “wedge-wood blue” background, dark blue border, and then lighter blue columns.
In this age of mobile devices, a mobile friendly design would be very useful.
From sqn sites I have seen, I imagine that plugins such as twitter, Google calendar, photo galleries, commenting, and members area would be very useful.