I am giving my home page a face lift with new images, colors, and designs. The structure will mostly be the same. Content is changed a bit, but the keyword density and prominence is about the same. Meta tags will be the same. My site already ranks in the top 5 for the keywords that I care about. Could there be any effect on my rankings when I switch the old site for the new site? Is there anything else that I should be aware of before making the update? Lastly, one new feature will be a small blog section at the bottom of the new site. It will just display the blog topic and the first few lines of the blog, with a link going to our blog page. The content of this will change every few weeks as we write and add newer blogs. Could this feature affect the rankings at all? Thanks for the help.