This. As I learnt from another website, it is a pain in the ass doing that in a safe way.
However, you could make some things like background or font color configurable.
Yes. Color is the only thing I care about. Adjusting to what doesn't hurt my eyes. Images and layouts and all are not that important to me, the data/knowledge in the site are important though. As long as we have quality posts/members/stuff I really can care less about the ascetics.
May be a stupid question, but will all threads and posts be migrated over to the new site? On my next day off, I'm going to get into PHP to maybe help with dev. If PHP is what is being used.