Fun yet serious
I used the colors of the logo to completely define the scheme of the template. I changed the color of the domain name as the black was too much of a contrast to everything else in the page. The textured look at the header and the blue bubbles give the page some life and fun. The green on the footer is to ensure that it stands out as the footer of a page tends to get missed. I know that you also stated that the newsletter should be at the footer; I tried adding a form element there but it took up too much space so I thought I would place it in the page itself.