How can I get my photo album cover to show up on my 360° page?

Yahoo 360 is funny like that. I've done the same method as you stated and for some reason, album cover doesn't change. I think you may have to edit your albums like say

a:june1

b:the party

c:having fun

or

1 june

2 the party

3 having fun

I think the system my read the list by letter or number and sets the main page in order. This is just assumption so please don't quote me for stating a fact :)

Give it a go. I'm too frustrated to do it and lack the patience. Hope you do work it out :)

Go into your yahoo photo album and make sure that the yahoo photo album is public with no restrictions, because if it is not public and has restrictions, yahoo360 will not show your photo album on yahoo360, also try using another display image, the one you are using might be corrupt or something. Try to put that image back up as the display image later.

i gave up on 360 it is very poorly designed. try myspace or one of the many other free sites that allow you to customize it.