I've added 3 screenshots of other podcasts covers that I like. The general "style" of the cover should be minimalistic and professional. You can also consider my website layout on http://www.christiangursky.com for further inspirations.
You can but you don't have to use one of the 3 pictures of mine that I've attached. You are the design expert. :-)
I would apreeciate if you can integrate my blue "Christian Gursky" logo.
I already run a survey on the existing drafts. Here is the feedback:
#7: Great one, but the style of the fonts should be improved just like in the podcast cover of "the art of paid traffic"
#4: High quality design, but the problem here is that covers are displayed in a 300x300 pixel scale. This one might not gain much attention due to the colors of the background image in that particulare scale.
I think I would love kind of a mix of #4 and #7.
UPDATES (Things I learned during the challenge and what everyone should know):
1. Please take a look at th "RAINMAKER.FM" cover I attached. The proportion of the title takes almost 25% of the space. That is why the titel is still readable if a smartphone scales the cover down to 150x150px. Please consider that in your draft.)
2. Please consider that iTunes shows a lot of covers next to each other and at a very small scale. A bold background cover, for example yellow, makes it more prominent in the iTunes gallery.)