New colours and layout

I've changed the background colours and I've also adjusted the number of posts that will appear on the front page. This is a temporary change and I'm hoping to gauge your opinion.
I've also adjusted the ads so that they will hopefully be more specifically related to the topics. For now, I'll keep them here.

Future changes may include a new start page and new commenting system. I'm also looking to organise a way for guest posts to work.

What do you think? Do you like the new look? Should I be more radical?