Shanni: Like someone already mentioned, the reason why the colors wouldn't work well, is because if someone buys white color, no one can read it on blue fantasy for example, without stopping to highlight it all. (And if it's beige, I still couldn't read it since beige is my highlight-colour. So I would have to go through switching my highlight-colour just for that one persons post.)
And if it's black or dark grey, then people on black fantasy can have trouble reading it.
And blue and red are colours that really jump out in black fantasy, resulting some serious 'ouch my eyes'-problem.
And the only way that would be something worth paying for, would be that no one else could be able to buy the same colour. So basically, it would turn unfair to others.
As for the being able to buy more inbox-space. I have always been hoping something like that would come along, but contributors deserve some specialties, and that has always been theirs.
And I don't see it an excuse to wait for Dai. Even though this forum is Aarins, she has given Dai the play-rights on all technical matters, so all major upgrading aside from rules and iShop, are left to Dai for principle, as well as because he is most likely the best one to do all the coding etc. Just my thoughts