Topic: Using Sass for css
I think it would be beneficial if punbb started using Sass for their css development. For those not aware Sass is basically PHP for css (all be it in Ruby!). It allows you to have variables, functions and includes. Everything you do is then compiled to normal css (can be minimised) so there is no overhead to the site.
I suggest a quick read of the front page here to see the power: http://sass-lang.com/ (they can explain it better than I can!)
The primary focus would be for developers to allow easier themeing and customisation and to minimise the stylesheets used (I see 1.4 is using minimisation anyway). I've been using it on my non punbb sites for a few months now and would never go back to normal css!