[DjCisco]

A couple of requests:
1) I would like a weather widget - something to display current conditions or a 3-day forecast - for the home screen.

Yes, that would be nice, I will see what I can do. For now you can already display the current temperature below the clock. These can be enabled in the skins settings.

2) I would like to be able to set a slideshow as the background for home menu items.

I would have to check this out. currently you can set a custom Image, this is done when configuring specific menu, there you will find a Picture Frame Icon on the top right of the screen, click it and set your custom image.

3) Could the clock be made a bit smaller?
4) I would prefer the posters for recently added items be smaller. Could they also maybe be moved a touch lower?

Sorry No, that is the skin's Style

5) For the 'Fanart' view, could the list be smaller? Maybe something like 7-8 items in the lower left corner, kind of like Neon's 'Slim List'?

I will see how the reduced amount of items looks, So maybe. The layour cannot be changed, BOX is all about keeping things the same, through the skin.