(besides the "Available Themes Filter" and besides the tags associated with each Theme, neither of which quite do it for me.) The faq page http://faq.wordpress.com/2006/07/08/which-themes-can-i-add-a-header-image-to/
is very nice but just deals with that one property of themes.
To help you see what I mean, here are two issues I am trying to sort out:
1) If there is a hierarchy of pages in a blog, is there a theme which displays the hierarchy (and not just a list of all the pages) in the header? (Actually anywhere, like in a widget would do, but that is a different issue.) IIRR "Ocean Mist" only displays the top level pages in the header.
2) If I have posts with Titles (maybe blank), a picture and then some text, are there themes which which will always show the pictures when you create lists of posts by, for example, clicking on an archive month; on a category name? Theme "White as Milk" seems to do this but that might be because the blog is not well populated yet (bobsmiscellany.wordpress.com/). Theme "Ocean Mist" appears not to.
Thanks in advance.