I looked only at the Group page. My display is always set at 800x600, so my views may or may not be relevant to other members. For me, the banner in the header is too tall. It's height forces the POTD image almost all the way off the page view. I would also ditch the fat gold button with date. Plain text for the date would take up less real estate and be in better harmony with the text around the date. The black border around the POTD image is Ok, but could be a little wider.
I get bored with the stark black backgrounds on all the other sites. The beige background here is a welcome relief. You could mix things up from time to time with other pastel shades or soft textures. Just to wake us up

Navigation to the "holding" pages for the retired POTD images is not obvious. Over time, if these image collections persist (which I hope they will), some organization is going to need to be applied to these pages.
As a "teaser" you might add a small text panel under the photo for selected viewer comments on the photos. The tease being to encourage more viewer feedback. Mitt link to these forums of course.
no help
